# A bus driver

Abus driver was going down the street.He was on the wrong side.He went at a stop sign and didn’t signal at a turn.He went under the minimum speed and yet he did not get in trouble for his actions.How is this possible?

He was a bus driver but he was only walking!

# Lost camel

A peasant has 30 camels. On his way back to the farm, he counts 29. Alarmed, he gets off his camel and counts the camels again. He finds 30. Half an hour later, he counts his camels again and finds 29. Alarmed, he gets off his camel and counts again. He finds 30. Can you explain?

He is not counting the camel when he is on it.

# To live and breathe

I never was, am always to be,

No one ever saw me, nor ever will

And yet I am the confidence of all

To live and breathe on this terrestrial ball.

What am I?

I am Tomorrow

# Two hospitals

A certain town is served by two hospitals. In the larger hospital, about 45 babies are born each day. In the smaller one, about 15 babies are born each day. Although the overall proportion of girls is about 50%, the actual proportion at either hospital may be greater or less on any day. At the end of a year, which hospital will have the greater number of days on which more than 60% of the babies born were girls?

The answer is 2: the smaller hospital. The Law of Large Numbers says:

The more people we survey, the more accurate the result.

Larger samples are better.

In this case, the number of children born each day is a random sample of the number of children born in a year. There is much more deviation in a small (daily, in this case) sample than over an entire year. Similarly, there will be more deviation in a sample of size 15 than in one of size 45. Even though both hospitals will have about 50% girls over the year, the smaller hospital will have more days in which the number is higher than 60% (and more days when it is less than 40%). (Consider the extreme case of a hospital that has one baby a day. Every day will be either more than 60% girls (one) or less than 40% girls (zero).

People commonly and mistakenly believe that even very small samples will have the same composition as large ones. Remember this next time someone uses a small survey sample to "prove" something -- the results may be invalid!

# Clasped hands

How can you clasp someone’s hands together in such a manner that they cannot leave the room without unclasping them?

Put their hands around a stationary object in the room, which will keep them from leaving the room unless they open their hands.

# Underwater

A magician was boasting one day at how long he could hold his breath under water. His record was 6 minutes. A kid that was listening said, “that’s nothing, I can stay under water for 10 minutes using no types of equipment or air pockets!” The magician told the kid if he could do that, he’d give him \$10,000. The kid did it and won the money. Can you figure out how?

The kid filled a glass of water and held it over his head for 10 minutes.

# More Money

would you have more money with a million dollars today or a penny today and double your money every day for 31 days?

double your money every day for 31 days