10+10 and 11+11 can give you the same answer.

Explain how?

I am an odd number. Take away a letter and I become even. What number am I?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

How can you tell a raw egg from a hard-boiled egg?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?