Why do we preferably have round manhole covers and not square ones?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Next Number in the Series,

5, 16, 49, 104, ?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Where do fish keep their money?

What is the next number in the series?

15 29 56 108 208 ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What does this Rebus Picture mean?