If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What is the difference between a jeweller and a jailer?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Solve the mathematical equation in the picture below.

Buy me, smell me or deliver me, I do not change.

Who am I?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

What kind of band never plays music?

Can you decipher the two rows to find the hidden word?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?