1000.11 | Three Shapes, Three Numbers |
1000.12 | Looping Paths |
1000.14 | Un-Knotting |
1000.15 | Telling Time Backwards, Part I |
1000.16 | Telling Time Backwards, Part II |
1000.21 | Floor Tile Reflection no. 1 |
1000.22 | Floor Tile Reflection no. 2 |
1000.23 | Floor Tile Reflection no. 3 |
1000.26 | Nasty Page Fold |
1000.31 | Tents Among Four Trees |
1000.41 | Non-Intersecting Paths on Grid |
1000.45 | Line Fragments no. 1 |
1000.46 | Line Fragments no. 2 |
1000.47 | Line Fragments no. 3 |
1000.53 | Stella's Fishpond |
1000.54 | Swapping Places |
1000.55 | Novice Bagpipers |
1000.56 | Yearbooks Meet Bookworm |
1000.57 | A Line of Men |
1000.61 | Poison Pills |
1000.65 | An Alphabet Line |
1000.66 | Alphabet Line |
1000.72 | Clock Hands, Purple Flashes |
1000.75 | Scott the Painter |
1000.81 | Continue the Pattern |
1000.82 | Acropolis Pattern |
1000.91 | Chessboard Dominoes |
1000.92 | Students Change Seats |
1000.93 | The Eight Queens Puzzle |
1000.94 | Take a Walk on a Checkerboard |
1007.11 | The Impossible Path |
1007.21 | Trace This Network |
1007.22 | Continuous Line Drawing |
1009.11 | Triangle Count |
1009.21 | Squares on a Checkerboard |
1009.31 | Counting Squares |
1009.41 | Squares on a Lattice |
1010.11 | Squares in a Square |
1010.41 | Sequences of Squares |
1010.42 | More Sequences of Squares |
1020.12 | Covered Shapes |
1020.15 | A Triangle with Given Midpoints |
1020.23 | Vacation on a Triangular Island |
1020.42 | Overlapping Squares |
1020.44 | Dividing the Yin and the Yang |
1020.51 | Manhole Covers |
1020.71 | Cutting a Sheet Cake |
1027.11 | Partition This Shape no. 1 |
1027.12 | Partition This Shape no. 2 |
1027.13 | Partition This Shape no. 3 |
1027.14 | Partition This Shape no. 4 |
1027.15 | Partition This Shape no. 5 |
1027.23 | Partition This Shape no. 13 |
1027.24 | Partition This Shape no. 14 |
1027.25 | Partition This Shape no. 15 |
1027.26 | Partition This Shape no. 16 |
1027.27 | Partition This Shape no. 17 |
1027.28 | Partition This Shape no. 18 |
1027.31 | Partition This Shape no. 21 |
1027.32 | Partition This Shape no. 22 |
1027.33 | Partition This Shape no. 23 |
1027.42 | Siamese Fighting Fish |
1027.44 | Congruent Gardens |
1030.11 | Nine Dots |
1030.12 | Sixteen Dots |
1030.21 | Utility Lines |
1040.11 | Ten Peach Trees |
1040.21 | The Wigglesworth Apple Trees |
1040.31 | Moving a Circle |
1050.11 | Penny Triangle |
1050.61 | The Rolling Penny |
1060.11 | Disappearing Toothpick Squares |
1060.21 | Toothpick Triangles |
1060.41 | Moving Toothpicks |
1070.11 | Limerick |
1070.12 | This Man's Father |
1070.13 | The Snail in the Well |
1070.14 | Beetle and Rock |
1070.15 | Pirate Queen Harriet |
1070.16 | Woodie Lott |
1070.18 | Baklava |
1070.19 | Watson's Purchase |
1070.21 | Grandfather Clock Strikes |
1070.23 | State a Theorem |
1070.31 | You'll Never Guess |
1070.32 | Barrel |
1070.33 | Snails and Details |
1070.43 | Park Run |
1079.11 | Crabcake |
1079.12 | Weedsport Clothing Boutique |
1079.41 | Word Triangle Arithmetic |
1080.12 | Spirals? |
1090.21 | Labeled Cube Views |
1090.22 | Cube Frames |
1090.24 | Looped Rings |
1090.25 | Bohemian Chain Mail |
1090.26 | Equitable Cake Cutting |
1090.31 | Mixed Sticks |
1090.33 | Cube Patterns |
1090.35 | Cube View 2 |
1090.36 | Cube View 3 |
1090.37 | Cube Identification |
1090.41 | Cutting a Rectangle |
1090.42 | Six Toothpicks |
1090.51 | Stark, Raving Bonkers |
1090.53 | Two Views, One Object |
1090.61 | A Pile of Cubes |
1090.71 | Twenty-Seven Little Cubes |
1090.72 | Cube, Orange, Made and Unmade |
1090.73 | Cutting a White Pine |
1090.74 | How Big is This Cube? |
1090.75 | Fly on the Cube |
1090.91 | The Pierced Cube |
1090.93 | The Six-Cubed Thing |
1090.94 | The L-shaped Block |
1095.11 | What Lies Opposite? |
1095.12 | The Checker-Boarded Face |
1100.11 | The Old Wooden Disc |
1100.22 | Continue a Numerical Pattern |
1100.51 | Agatha the Cow |
1100.52 | The Flu |
1100.71 | Martha the Grocer and her Two-Pan Scale |
1110.11 | Numbers in Circles |
1110.22 | Around the Corners |
1110.41 | Digit Cells |
1110.43 | A Fancy 8-Digit Number |
1110.44 | Ten Billiard Balls |
1110.61 | Security Guards |
1120.11 | Crossnumber Puzzle no. 1 |
1130.11 | A Magic Square with Primes |
1140.11 | Two Pails and a Duck |
1140.14 | Sharing Soda |
1140.51 | A Phone Call |
1160.11 | SEND MORE MONEY |
1160.12 | ALAS LASS part 2 |
1160.31 | Product Places |
1160.32 | Multiplication Puzzle |
1160.34 | Crypto-Product |
1160.36 | Crypto-Product |
1170.21 | Money Bag |
1170.23 | Yearbook Earnings |
1170.24 | Dimes and Pennies |
1170.42 | Can't Change a Dollar Bill |
1170.91 | Path of Quarters |
1170.92 | A Ton of Pennies |
1170.93 | The Weight of 1000 Dollars in Dimes |
1170.94 | Total Tree Growth |
1180.21 | Missing Dollar |
1180.22 | Horse Trading |
1180.23 | Tony's Hat |
1180.32 | Commute to Possum City |
1180.35 | Flutists and Violinists |
1180.36 | Restaurant Staff Puzzle |
1180.37 | Dogs, Cats, Snakes |
1180.41 | Sherman and Cyrus |
1180.42 | Chain Links |
1180.43 | Gleepers & Blahmies |
1180.44 | Social Scale of Boojums |
1180.45 | Biology Lesson |
1180.46 | Bike to the Beach |
1180.61 | Mathies and Websters |
1180.62 | Robins Here and There |
1180.64 | Paper Thickness |
1180.65 | Tennis Tournament |
1180.66 | The Problem Before . . . |
1180.81 | Horse Race |
1180.83 | Vanilla Yoghurt |
1180.84 | Mixing Wine and Water |
1180.85 | Errors |
1190.11 | Charlize's Age |
1190.12 | Light Year |
1190.14 | Running for President |
1190.17 | Digital Clock Minutes |
1190.18 | Breaths in a Year |
1190.19 | Two Erratic Clocks |
1190.31 | Charlie and LaQuanda |
1190.32 | The Phone Booth |
1190.34 | Kant's Clock |
1190.52 | Day Before Yesterday |
1190.53 | No Weather |
1192.21 | Anastasia's Birthday |
1200.11 | Contest Results |
1210.21 | Cheerleader Tryout |
1210.31 | Pigeon Island |
1220.11 | Five Houses, a Camel, and Lemonade |
1230.11 | Baseballs and Grapefruit |
1230.21 | The Gardner, the Baker, and the Fisher |
1230.22 | Train Crew |
1230.32 | Blue, White, and Gray |
1230.33 | Four Athletes |
1230.34 | Super-Duper Market |
1230.36 | Tennis-Playing Family |
1230.41 | Hot Potato |
1230.42 | Who is Going with Whom? |
1230.43 | Student Body Officers |
1230.44 | Glenda Aces a Quiz |
1230.46 | Tina's Trip |
1230.47 | Ant, Bat, Cat |
1230.51 | Playing Cards to Identify |
1230.52 | Spirit Week Bake Sale Booth |
1230.53 | Who is in Which Family? |
1230.54 | Students and Cars |
1230.55 | Letters and Envelopes |
1230.56 | Take your Pills |
1230.61 | Amy, Brenda, Christa, Dana |
1230.63 | Maurice’s Video Games |
1230.64 | Card Nonsense |
1230.65 | Identify the card |
1230.71 | Chemical Conundrum |
1232.11 | Soccer Scores |
1232.31 | Six Who Witnessed a Burglary |
1240.11 | A Fox, a Goose, and a Bag of Corn |
1240.12 | Four Men, Two Boys, and a Boat |
1250.11 | False Coin no. 1 |
1250.12 | False Coin no. 2 |
1250.13 | False Coins no. 3 |
1255.11 | Scales |
1260.01 | Handshakes (24, 1) |
1260.02 | Handshakes (n) |
1260.21 | Handshakes; Fly on the Wall |
1270.11 | Pigeons |
1270.12 | Pigeonholes no. 2 |
1270.13 | Globs and Glitches |
1280.11 | Toad Tales |
1280.12 | Highland Island |
1280.21 | Spying on Student Council |
1290.11 | Ice Cream Survey |
1290.13 | A Hot Air Balloon Club |
1290.14 | Gym Class |
1290.15 | CSD student body |
1300.11 | Mystery Number |
1300.12 | Mileposts |
1307.11 | Consecutive Integers Sum |
1307.12 | Four Consecutive Integers |
1307.31 | Consecutive Integers, Sum of 100 |
1310.11 | Evens Minus Odds |
1310.25 | Super Venn Diagram |
1310.31 | Resupplying the International Space Station |
1310.41 | Dartboard with a Black Hole |
1310.61 | Never 100 |
1320.11 | The Number of Digits in a Product |
1322.11 | Giant Powers of 3 |
1322.14 | Chinese Remainders |
1330.11 | Square Mistake! |
1331.11 | Guess My Age! |
1331.12 | Louie's Age |
1331.14 | Difference of Squares |
1332.11 | Whole Number Radicals |
1334.11 | Square and Cube |
1340.41 | LOVE |
1340.42 | MISERABLE |
1340.52 | Pocket Change |
1365.11 | Decimals On Screen |
1368.21 | Torture with Fractions |
1368.25 | Egyptian Fractions Intro |
1368.31 | What's That Fraction? |
1370.11 | Gain Versus Loss |
1370.21 | Dust Mites |
1380.11 | Some Sums |
1380.31 | Find the falsehood |
1395.21 | Radical in Radical |
1410.11 | How Many Digits? |
1410.12 | A Number Pattern |
1430.11 | The Mean 9's |
1460.21 | Target Products |
1470.12 | Tearing and Stacking |
1470.41 | A Giant Sum |
1470.51 | Heartbeats per Month |
1470.52 | Heart Beats |
1470.53 | Dripping Faucet |
1470.54 | A Million Drops of Water |
1480.11 | Repeating Digits in Addition |
1480.21 | A Large Multiple of 17 |
1480.41 | Broken $\surd$ Key |
1490.11 | Thunderbird |
1490.12 | The Number One First Class Happy Bank |
1490.16 | Buying Sand |
1490.21 | Prom Bands |
1490.31 | Tie-Dyed T-Shirts |
1510.11 | Heap: An Egyptian Equation |
1510.21 | Pamela Gore |
1510.22 | Pebble's Long Life |
1510.41 | Alex Watt's Will |
1510.42 | Farmer Fox |
1510.43 | Ftatateeta's Scarabs |
1510.51 | Stella's Musical Scores |
1510.52 | Totem Pole |
1530.21 | Choir Risers |
1530.31 | Jellybeans |
1530.32 | Basil's Age |
1530.33 | I Have a Good Friend in Maumee |
1530.34 | Paul's Cheese |
1530.35 | Mr. Eby's Spare Tire |
1530.36 | Lake Erie |
1540.21 | Golden Oldies |
1540.33 | Hattie's Age in 1900 |
1540.34 | Aggie's Eggs |
1540.35 | Apples on a Hike |
1540.36 | Conquest of Bread |
1540.37 | Celeste in Obieland |
1540.41 | Brine Tank |
1540.51 | Electric Bill Printing |
1540.61 | Tape Sale |
1540.71 | Stella's Barbecue |
1540.72 | Waterbed Weight |
1550.11 | Shelley, Veronica, Christy, and Ruth |
1550.12 | Malaz, Ron, Debra, and Sabrina |
1550.14 | Toy Rocket |
1550.15 | Rooster, Goose, Duck Prices |
1550.16 | Harnessing Horses |
1550.18 | Jacob's Bumper |
1550.19 | Wrestlers on the Scale |
1550.21 | Speeding Cycles |
1550.22 | In A Dream |
1550.23 | Batting Average no. 1 |
1550.24 | Sibyl Bibble |
1550.25 | Tree and Nests |
1550.26 | Brick on a 2-Pan Scale |
1550.27 | Mr. Adams's Will |
1550.28 | Swerve's Bikes and Skateboards |
1550.29 | Restaurant Bill |
1550.31 | Rick's Bed |
1550.32 | Eggs to Carry |
1550.33 | Basketball Game Tickets |
1550.35 | Sandwiches |
1550.36 | Splitting up Eighty-Eight |
1550.38 | Bananas and Pears |
1550.39 | Trading Cards |
1550.41 | Cows and Oxen |
1550.42 | Pythagoras Party |
1550.43 | A Horse and a Mule Converse |
1560.11 | Picka Numba |
1560.12 | Leon Cranville's Picka Numba |
1600.13 | A Prime Number |
1600.21 | Even Numbers and Primes |
1600.31 | Getting to Fort Wayne |
1600.41 | Primes Conjecture |
1610.11 | One Million |
1610.12 | Primes in Product |
1610.31 | Nasty Numbers |
1640.31 | Ballpoint Pen Sale |
1640.41 | Find the Number! |
1640.61 | The Largest What! The Smallest What! |
1650.12 | Jasper's Marbles |
1650.13 | Wok Around the Clock |
1650.21 | Dorothy and the Eggs |
1650.31 | Divisibility Theorem (Sum) |
1680.11 | Factorial Perfect Squares? |
1720.11 | TTT |
1720.41 | Patterned Equations |
1720.51 | Maximum Product |
1730.31 | Counter-Factual Theory |
1730.32 | Squares and Cubes in a Pattern |
1730.41 | Need More Money? |
2020.11 | Expand That Binomial! |
2050.21 | Four Fours: One to Twenty |
2050.22 | Four 4’s: 21 – 40 |
2050.41 | Six Nine's Make A Hundred |
2050.44 | Parentheses Insert |
2070.12 | Formula for Apple Fritters |
2070.13 | The Price of a Dozen Kumquats |
2070.14 | Ghanaian Shirts |
2070.21 | Mrs. McGillicuddy's Age |
2070.22 | Alyssa's Formula |
2070.23 | Babysitting Rates |
2070.31 | Rent-A-Heap |
2070.33 | A Rectangular Box |
2070.41 | Stacking Grapefruit |
2070.43 | Big and Little Cubes |
2070.51 | Square of Dates |
2070.61 | Big Round Dinosaur Buttons |
2070.71 | Next Perfect Square |
2070.82 | Mystery Function |
2070.83 | Bowling Uphill |
2070.84 | Particle Motion |
2100.12 | Who's The Champion? |
2100.21 | Symmetric Exponents |
2100.32 | Sums of Odd Numbers |
2100.33 | Sum of Odd Numbers |
2100.35 | Fiddling with Exponents |
2100.52 | Rational Expressions, Laws of Exponents |
2100.81 | A Product Plus One |
2110.11 | Big Product |
2110.12 | Giant Distribution |
2110.34 | Three Numbers |
2120.11 | Messy Numerical Expression |
2120.12 | Factor! |
2121.11 | Unlikely bandanas |
2122.11 | Factoring a Cubic |
2122.14 | Divisibility by 16 |
2122.15 | Pairs of Integers |
2122.41 | Perfect Square? |
2140.11 | Triple Ratio |
2140.31 | Gear Wheels |
2140.71 | Beakers, Ratio of Acid to Water |
2150.11 | Difference of Reciprocals |
2150.21 | Reciprocal Symmetry |
2150.22 | Diminished by a Reciprocal |
2150.41 | Adding x to Numerator and Denominator |
2150.62 | Lowest Terms? |
2150.72 | Find the Equivalent |
2150.81 | A Horrendous Quantity |
2152.22 | Catch a Robber and Maximize Your Reward |
2162.11 | An Infinite Continued Fraction |
2180.11 | Real-valued Radical |
2200.11 | Positive Integer Solutions: Count Them |
2200.21 | An Equation with Fractions |
2200.61 | Holstein or Guernsey? |
2210.11 | Fraction Inequality |
2210.21 | Inequality |
2210.32 | Fractional Inequality |
2210.41 | Distance on the Number Line |
2210.51 | In-equali-tease |
2210.71 | Point on a Line. Making a Triangle? |
2210.81 | An Inequality with Radicals |
2211.11 | Absolutely Unequal |
2211.21 | Product with an Absolute Value |
2220.11 | Timbuktu Post Office |
2230.11 | DON'T GUESS! |
2230.22 | The Golden Ratio |
2230.31 | A Circle and a Parabola |
2230.32 | A Quadratic Question |
2230.41 | Find the Smallest Root |
2230.51 | Jessamine Bush |
2230.62 | Two Quadratics |
2230.63 | Almost Equal Roots |
2230.81 | Cathy the Cat Burglar |
2232.11 | From a Progression to a Quadratic |
2240.11 | A Butterfly Garden |
2250.11 | A Nice Rational Equation |
2250.21 | Strange Equation |
2260.11 | Huge Difference of Squares |
2260.21 | A Fourth Degree Equation |
2260.31 | Outrageous Cube Root |
2260.41 | Two Cubes |
2288.11 | A Symmetric Equation |
2290.11 | The Dutch Miller |
2290.21 | Ratio-Difference-Sum-Ratio |
2290.41 | Wine and Punch Bowls |
2300.11 | Exponential Equation With Threes |
2310.11 | Fleet Street Market |
2310.21 | Coffee Break |
2310.31 | Intersecting Lines |
2310.41 | Parking |
2315.11 | Equations with No Solution |
2405.12 | Pickanumba 1 |
2405.24 | Translation into Algebra |
2410.11 | A Salesman's Commission |
2410.12 | Spend or Save? |
2410.13 | Bertha's Tax |
2410.21 | Tennis Team |
2410.23 | Igor's Foul Shots |
2410.33 | Battling Percentages |
2410.34 | Wendy the Chemist |
2410.42 | Pompeii Geothermal Corp. Wages |
2420.11 | Hen and a Half |
2420.12 | Hen and a Half, Variables |
2420.21 | Horses and Oats |
2420.31 | Watering Your Venus Flytrap |
2420.34 | Emptying the Swimming Pool |
2420.35 | Robots at Work |
2420.41 | The Cow, the Goat, and the Wildebeest |
2420.51 | Glenice Burns her Candles |
2420.62 | Brick Wall |
2430.11 | Three Valves |
2440.11 | Beef's Lost Loot |
2440.12 | Orthodontist |
2440.13 | Driving to Nirvana |
2440.14 | Trains DC-NYC |
2440.15 | Rocket Sled |
2440.17 | Maggie and Aggie |
2440.21 | Duckburg to Possumtown |
2440.31 | Columbus to Cincinnati |
2440.32 | Driving to Atlanta |
2440.33 | Susu the Cat |
2440.41 | York to London |
2440.51 | Race to the Bus |
2440.52 | Wilbur's Boat Trip |
2440.62 | Bike Ride to Oberlin |
2440.63 | Rashon and Santiago |
2440.70 | Snow Tires Versus Ordinary Tires |
2440.71 | Uther and Eethyl |
2440.74 | Fly Between Trains |
2440.75 | Around the Reservoir |
2440.76 | Jetta versus Corvette |
2440.77 | Barnabas and the Overpass |
2440.78 | Figure Eight Racing |
2440.79 | There's a Train in that Tunnel |
2440.82 | Gabriela and her Chauffeur |
2440.93 | Train Speed |
2442.52 | Daniel Boone on Plum Creek |
2452.12 | Doctors and Lawyers Play Dodgeball |
2452.13 | Fifty Mycologists |
2452.14 | Math Team Average Weight |
2452.31 | Strange Batting Average |
2452.33 | Batting Average no. 2 |
2454.11 | How Mean? |
2460.11 | Angela's Age |
2460.13 | Ezzaldeen's Age |
2460.15 | The Year the Old Cow Died |
2460.27 | Jianyi and Dylan's Ages |
2460.28 | Present and Future Ages II |
2460.29 | Present and Future Ages III |
2460.31 | Present and Future Ages III |
2460.81 | An Unlikely Coincidence |
2465.11 | The Luxury Yacht Gemini |
2465.21 | Stephanie and Bonnie's Ages |
2465.31 | Dorcas Ducat's Age |
2465.99 | The Rope |
2470.11 | Backlot Books |
2470.21 | The Barbell Exchange |
2470.31 | Jellybean Profits |
2470.52 | Teapot Trade |
2470.62 | Solar Panel |
2480.11 | A Birthday Present in Dimes and Quarters |
2480.31 | Dividing A Tenner |
2480.51 | Trading Marbles |
2490.11 | Supermarket Apples |
2490.21 | Kite Strings |
2490.32 | The Grow'm Good Nursery |
2500.11 | Pet Rocks |
2500.12 | Stationery |
2500.21 | Finding Sides of a Triangle |
2500.31 | Foxes and Owls |
2500.41 | Milly and Molly Make Muffins. So Do Their Mothers! |
2500.51 | Defeating, Then Passing a Bill |
2500.61 | Cows, Sheep, Horses |
2500.63 | Kumquat House Numbers |
2500.71 | Airplane Baggage |
2500.81 | Euler Problem: Equal Shares of a Fortune |
2510.11 | Defined Operation no. 1 |
2510.21 | Defined Operation no. 2 |
2510.31 | The Add-One-Subtract-One Operation |
2530.11 | Defined Operation; Find Formula |
2530.31 | Mystery Linear Operation |
2530.41 | Composition with a Defined Operation |
2530.51 | Defined Operation 3; Do Composition |
2530.52 | Defined Operation 4; Do Composition |
2530.73 | Strange Salary |
2544.11 | Function as Average |
2580.11 | Big f(x), Find f(6) |
2580.22 | If . . . Then . . . |
2580.41 | A Seventh Power Equation |
2580.51 | A Hard Functional Equation |
2580.61 | Sequence Formula |
2590.12 | Function Graphs |
2600.12 | Postage Function, Using [ ] |
2615.11 | A Mystery Function |
2660.11 | Imaginary Roots |
2680.11 | Cubic to Quadratic to Linear |
2702.11 | Add'Em Up |
2710.11 | Sum of Digits |
2720.11 | Minimizing the Sum of Distances |
2730.32 | Nothing but Logs |
2730.33 | Love Those Logarithms |
2730.39 | Complicated Log Equation |
2740.11 | Relating Two Logs |
2740.38 | Find k (logarithms) |
2760.21 | Adjacent Corner of a Square |
2761.11 | A Sum of Slopes |
2761.12 | Collinear Vertices of Squares |
2761.13 | A Tantalizing Trapezoid |
2764.11 | Stella's Fishpond II |
2770.21 | Lines! Intersecting! |
2770.31 | Trisection Points |
2770.51 | Moving Line |
2782.11 | Minding Your p's and q's |
2784.11 | Big Stone Arch |
2788.21 | Circle through (1989,y) |
2788.31 | Two Circles and a Line |
2850.21 | Situps |
2850.41 | A Recursive Sequence |
2850.48 | Continue the Sequences |
2850.49 | Continue the Sequence |
2850.51 | What's The Next Term? |
2850.61 | 1, 2, 2, 1, 1, 2, 1, 2, 2 . . . |
2850.65 | A Sequence by Subtraction |
2860.11 | Integer Sum of Unknown Length! |
2860.31 | Even and Odd Numbered Terms |
2860.41 | Fraction Pattern |
2860.51 | Robot Stones |
2860.61 | Arithmetic Sequence I |
2870.11 | Levy's Basketball |
2870.21 | A Mixed Geometric and Arithmetic Sequence |
2890.11 | Fibonacci Numbers Mod 11 |
3050.11 | Fireman on the Ladder |
3050.12 | Bugs on a Branch |
3060.51 | Red and Blue Point Line Segment |
3060.52 | Red and Blue Point Triangle |
3060.53 | Red and Blue Point Parallelogram |
3060.54 | Red and Blue Points, Right Angle |
3060.55 | Red and Blue Point Octagon |
3060.61 | People In Groups |
3065.11 | Red/Blue Tubular Neon Lights |
3070.11 | Algebra with Angles |
3070.12 | A Supplement/Complement Conjecture |
3080.31 | Seventeen Opinionated People |
3150.11 | Calculating an Angle |
3155.21 | Jasmine and Biscuit |
3155.22 | A Triangular Garden |
3155.41 | A Mystery Angle |
3155.51 | A Narrow Sinister Alley |
3155.61 | Triangle Cleverness |
3160.11 | Triangle ABC is Isosceles |
3232.11 | Triangle-ing |
3261.11 | Quadrilateral BCDF is a Rhombus |
3305.11 | Diagonals of Two Regular Polygons |
3305.51 | Making a Regular Octagon |
3305.52 | Stop Sign |
3310.11 | Sum of Interior Angles |
3310.19 | A Pentangle |
3320.11 | A Ratio of Areas |
3320.21 | A Square Inside a Circle Inside a Square |
3321.11 | A Circle and A Square |
3340.12 | Trapezoid Angle Measure |
3350.11 | Overlapping Parallelograms |
3360.11 | Mystery Trapezoid |
3360.21 | Rectangle Decomposition |
3360.22 | City Hall Tile Floor |
3405.11 | Seven Rectangles |
3405.12 | Impossible Rectangle? |
3405.31 | Pumpkin Patch |
3410.32 | Squares Make An Octagon |
3415.11 | The Square Community Garden |
3420.11 | Half a Square Foot |
3420.12 | Two Squares |
3420.22 | The Area of a Cross |
3420.24 | Three Equilateral Triangles |
3420.25 | The Sum of Two Triangles |
3420.26 | Area of a Hexagon |
3420.27 | Triangle Area |
3420.28 | Shaded Square Area |
3420.29 | Midline Triangle |
3420.31 | The Trapezoid and the Triangle |
3420.41 | Dance of the Area Bisectors |
3420.42 | Cake-Cutting |
3420.43 | Regular Triangle, Regular Hexagon |
3420.51 | Area of a Regular Pentagon |
3420.61 | Two Triangles and a Square |
3420.71 | Hard Triangle Area |
3420.73 | Crazy Baseball Diamond |
3420.81 | Intersecting Medians |
3440.12 | Billy the Goat |
3440.13 | A Girl and Her Dog |
3440.31 | A Lovely Circular Lawn |
3440.41 | First: Trisect the Diameter |
3440.43 | Fencing Inside a Circular Field |
3440.51 | Fraction of a Circular Area |
3440.61 | Design for a Pendant |
3440.62 | Area of an Axe Head |
3450.21 | Tetrahedron Inscribed in a Cube |
3460.11 | Split That Triangle! |
3470.12 | Radio Antenna |
3470.13 | Clairbouyant |
3470.14 | Square with Internal Segments |
3470.16 | Area of a Triangle |
3470.21 | Distance in flight |
3470.32 | Cardboard Box |
3470.51 | A Triangle in a Circle |
3470.61 | Barber Pole |
3475.11 | The Unknown Edge |
3500.11 | Segment in a Circle |
3500.21 | Midpoint of a Chord? |
3500.31 | Circle Around Three Squares |
3500.41 | Water Pipes Stack |
3500.51 | Gertrude the Goldfish |
3500.61 | Three Circular Disks |
3500.63 | Four Tangent Circles |
3500.71 | Find the Radius |
3510.11 | Describe that Shape! |
3510.12 | Parallelogram? |
3510.13 | Is It a Parallelogram? |
3520.11 | The Balancing Pot |
3530.11 | Diameter of a Circle |
3550.11 | LP Phonograph Record |
3550.21 | Clock with Revolutionary Bug |
3550.23 | Our Whirling, Twirling, Swirling World |
3550.24 | Put Your Hands Together |
3550.44 | Walking the Equator |
3550.51 | A Wheel Within A Wheel |
3560.11 | Intersecting Chords |
3580.11 | Trapezoid |
3580.13 | Two Equilateral Triangles |
3580.14 | Akashi-Kaikyo Bridge |
3580.15 | Estimating Height |
3580.17 | Similarity Exercise |
3580.21 | All Angles |
3590.11 | Parallelogram and a Geometric Mean |
3615.51 | Parallelepiped |
3640.11 | Basketball in a Box |
3650.11 | Peanut Butter Pricing |
3650.13 | A Solid Cube of Bricks? |
3650.14 | Tennis Balls |
3650.15 | Pouring Water |
3650.21 | Two Barrels |
3650.23 | Big Rectangular Solid |
3650.31 | Volume and Surface Area of a Cube |
3650.41 | Pouring Between Glasses |
3650.51 | Box in a Hat |
3650.61 | Triangular Pyramid |
3680.21 | Grasshopper Jump |
3680.31 | Finding a Slope |
3695.11 | A Square in a Cube |
3721.11 | Symmetric Lines |
3750.13 | Wind Farm Fun Facts |
3750.21 | Negating Barbells |
3750.31 | Yobs, Blobs, and Slobs |
3750.41 | Find the Falsehoods |
3750.61 | Pickled Walnuts |
3750.72 | Subsistence Allowance |
3750.73 | Mongoes, Booms, and Flems |
3750.74 | Toxic Tangles |
3850.11 | Rhombi, Locus of Vertex |
3850.12 | The Caged Triangle |
3850.14 | Where Are The Crumbs? |
4040.11 | When Does sin(x) = x/100? |
4050.11 | Angles in a Special Triangle |
4050.12 | Area External to Two Circles |
4050.14 | From Tangent to Sine |
4100.11 | Compound Fraction: Trig |
4100.12 | There's A Cosine In It |
4100.21 | Find a Sine |
4100.22 | Cosine of Three |
4100.31 | Sin(x) + Cos(x) |
4100.41 | That's Impossible! |
4120.11 | Insulating Tape |
4120.21 | The Fibonacci Area Paradox |
4140.11 | Find the Circumference |
4200.11 | Tetrahedron Cutoffs |
4200.21 | A New Volcano |
4200.23 | The Yacht Gemini on the Hudson |
4200.24 | Rocket Launch |
4200.25 | Sighting an Airplane |
4200.27 | The Top of the Turbine |
4200.42 | The Vertical Tower |
4220.11 | View to the Horizon |
4220.21 | Circumnavigating the Earth by Plane |
4220.41 | Stork's Nest |
4310.31 | Star of David |
4400.11 | Knowing the Shot |
9999.99 | Who is in which family? |