There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

The more of this there is, the less you see. What is it?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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

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?

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Find the last number in the series below:

voN luJ yaM raM ---

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?