There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What has 88 keys?

How many letters are in the alphabet?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?