While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

Move three sticks of the spiral below to form a square.

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you find the six hidden animals in the picture below?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

The answer I give is yes, but what I mean is no. What was the question?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.