A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What has one eye, but can’t see?

If you say my name, I will no longer exist. What am I?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Prove that twice of ten is the same as twice of eleven.

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

2, 3, 5, 9, 17, _ What is the next number in the sequence?