
Downloads
The Files links below allow you to download challenges in sets of four as .PDF files,which are designed to be viewed and printed in Adobe Acrobat Reader.. Challenge PDF files are about 400K and should take 3 to 5 minutes to download with a 56K modem.
Printing the Challenges
Printing the PDF files from Acrobat Reader reproduces the Challenges much better than simply printing from within your browser.
Caution:If you are printing on a color printer,you may want to set your printer to black &white or gray as the Challenges use significant amounts of color. (Or just download the black &white versions below.)
Note: It may be necessary to scale your page setup to 85% or select “Fit to Page”to print entire page on a single sheet of paper
Challenges in Adobe Acrobat PDF File
INDEX
1 | Line Up! | How long do you have to stand in line? | |
2 | Beating Heart | How fast does your heart beat? | |
3 | Popcorn | Which shape holds the most popcorn? | |
4 | Don’t Fall In | Why aren’t manhole covers square? | |
5 | Upside Down? | What letters can be read the same upside down as right-side up? | |
6 | Which Way? | How many different ways are there to get to your destination? | |
7 | Double Or Not | Which sequence grows the fastest? | |
8 | Stamps | Can you combine the stamps to make $1.77? | |
9 | Mirror,Mirror | Does backing up show more of me? | |
10 | What’s My Angle? | Do bigger hands have larger angles? | |
11 | Play Ball! | What is round,hard,and sold for $3 million? | |
12 | Chocolate! | Which chocolate-covered cookie would you eat? | |
13 | Thirteen! Oh No! | How many Fridays are Friday the thirteenths? | |
14 | Battling Averages | Who comes out on top after a day at the ballpark? | |
15 | Big Trees | Are there trees big enough to drive a car through? | |
16 | Beanie Babies® | Can you make money selling Beanie Babies®? | |
17 | Perplexing Percentages | So how much does it cost? | |
18 | Tern Turn | How fast can an Arctic tern fly around the world? | |
19 | Two Points | Who won the basketball game? | |
20 | Basketball Picks | A logical question. Can you puzzle it out? | |
21 | Body Mass | Is Helix’s health at risk? | |
22 | Combination Locks | What if you forgot your combination? | |
23 | Fractals | What image comes next in this sequence? | |
24 | Gasoline Tanks | How far can you go on one tank of gas? | |
25 | Grape Juice Jungle | Which brand of concentrate tastes “most grape?” | |
26 | I Win! | Is this dice game a fair one? | |
27 | Life Expectancy | Do women live longer than men? | |
28 | Pigeonholes | How many people would have to be in a school in order for at least two of them to have the same first and last initials? | |
29 | Salaries | Will women ever earn as much money as men? | |
30 | Smiles | How much is a smile worth? A logical problem… | |
31 | Tournaments | How many more games need to be played in the modern NCAA during March Madness? | |
32 | Windshield Wipers | It’s raining! Which wiper design clears the greater area of the windshield? | |
33 | Access Ramps | How steep can a ramp be? How far away should the ramp start to go up three steps? | |
34 | Faster? | Florence Griffith-Joyner was timed at 0.91 seconds for 10 meters in the Olympics…could she outrun a car? | |
35 | Fire Hydrant | What shape is at the very top of a fire hydrant? | |
36 | Majority Vote | What percentage does it take to win the vote? | |
37 | Map Coloring | How many colors are needed on a map of the the US? | |
38 | Monday’s Child | On what day were you born? | |
39 | Patios | Does bigger perimeter mean bigger area? | |
40 | Putt-Putt | Can you make a hole-in-one on this course? | |
41 | Radar Bills | Do you have a radar bill in your pocket? | |
42 | Rose Bowl | Can a football team score 11 points in a game? | |
43 | Seeing Stars | Can you draw a picture of the stars on an American flag? | |
44 | Table for 19 | How much room do you need at a table? | |
45 | Three Squares | How can two squares make a third? | |
46 | Time Zones | How many time zones between San Francisco and Cairo Egypt? | |
47 | VCR | Do you always get 6 hours on a six-hour tape? | |
48 | Working Hours | How much time do teens spend on the job? | |
49 | Angolan Sand Pictures | What does the intermediate design look like? | |
50 | Animal Ages | Do dogs age faster than humans? | |
51 | Bar Codes | Can you “crack”the bar code? | |
52 | Capture-Recapture | How many fish are in the pond,and how do you know? | |
53 | Census | How many people live in the United States? | |
54 | Cut the Cake | What’s a fair share of the cake? | |
55 | Decorating Boxes | How do you print a ribbon on a box? | |
56 | Drip Drops | How much water do you waste? | |
57 | Envelopes | How can you fold a sheet of paper into an envelope? | |
58 | Gone Fishing | My,my,little fish;how you’ve grown. | |
59 | Japanese Floors | How do I cover thee? Let me count the ways. | |
60 | Number Tricks | Bet I can guess your color | |
61 | Statue of Liberty | Is the Statue of Liberty’s nose too long? | |
62 | Keeping Cool | When should you buy block ice or crushed ice? | |
63 | Matching Birthdays | Same birth month? No Way! | |
64 | Wheel of Fortune | Who would you guess? | |
65 | Tan-Don’t Burn | How long before you burn? | |
66 | Airport Runways | Why are airport runways numbered? | |
67 | When in Rome | Does Polygon need a jacket today? | |
68 | Bones | Does drinking soda affect your health? | |
69 | Misaddressed | How could I send the check and not pay the bill? | |
70 | Soda | Does it make a difference where you shop? | |
71 | Archeology | Site A! Site B! How alike are we? | |
72 | TV Ratings | When DO most people watch television? | |
73 | A Shard or Two | How big was the plate? | |
74 | The Race | Who runs faster | |
75 | Glide Ratio | How far can you fly a paper airplane | |
76 | Visualizing | Is seeing believing? | |
77 | Movie Money | Do movies make money? | |
78 | Bowl ‘Em Over | Does he have a chance? | |
79 | Morphing | Can you turn a frown into a smile | |
80 | Gifts Galore | Is there room for all these gifts? |

