Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

How can you leave a room with two legs and return with six legs?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

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

Explain how?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you name some countries which do not have the alphabet 'A' in them?

Solve the counting riddle by identifying the number of triangles in the given picture.