What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

By using 'because' continuously three times, can you make an English statement ?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

What goes through cities and fields, but never moves?

When is the top of a mountain similar to a savings account?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?