A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

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

Which tank will fill first?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

No matter how little or how much you use me, you change me every month. What am I?

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?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

What part of the chicken has the most feathers?

During which month do people sleep the least?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?