Find out the missing number in the picture attached:

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

A man dies of old age on his 25 birthday. How is this possible?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

What is the centre of gravity?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you identify the hidden rebus in the image below?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?