172: Fleur-de-lis

"That's cool. Where's it from?"

"The Old Mississippi River bridge. There were once probably tens of thousands of these on that bridge. Both sides of each rail on each side of the road every 24" for a mile. I've got five of them."

171: Steering Wheel.

These are the control knobs on a Formula 1 Race car. How many can you figure out the purpose for?

170: Proof Without Words 4

Can you interpret this Proof Without Words?

169: Quick Fractions

Explain whether 4/3 or 3/4 is closer to 1, and how you know.

168: Knight's Tour

An engineer from New Zealand, Mr. Sturmer, published this Knight's Tour in 1888. Can you follow the tour and recreate the poem? (Mouseover the image for a hint)

167: Probability, p5

Here's some more advice for you. Is there anything true about this advice?

Snakes on a plane:
When you're flying, always take a pet snake with you in your hand luggage. The probability of there being TWO snakes on the plane is almost zero, so you will be safe from snake attack.

Staying dry at the cricket match:
Follow the example of the famous mathematician Hardy and take an umbrella with you to cricket matches. If you forget your umbrella it is more likely to rain, so if you remember to take it with you it is more likely to be sunny all day.

 

166: Lottery, p4

Here's some more advice for gamblers. Do you agree with it or not?


Coin Flipping:
If tails has come up on the last 9 occasions then it's a good idea to call tails again.

Winning at Roulette:
If red has come up lots of times in a row, you should bet on black next.