Name a key which is hardest to turn.

Can you divide the below-given shape into four equal and identical pieces?

What is more useful when it is broken?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

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

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?

Two friends Smith and Andrew were talking about the bravery of their families. Smith told great stories about his courageous grandfather who fought for Britain in "World War I". Andrew told that his grandfather was so brave that in 1919 just after the war he was honoured with a bravery medal with the words "For our Courageous Soldiers In World War I" embedded into it. Smith knows that his friend is lying. How?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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