What is the fastest way to double your money?

Can you solve the maths in the below-given picture equation?

Why do Chinese men eat more rice than Japanese men do ?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

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

Can you count the number of squares in the given picture?

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 ?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Next Number in the Series,

5, 16, 49, 104, ?

Why do people go to bed?