If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

Where do fish keep their money?

The more you take me, the more you leave me behind.
Who Am I?

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

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

Solve the following series:
AZ, GT, MN, __, YB

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

What makes this number unique: 8,549,176,320?

What is the centre of gravity?