How is a fly different from a mosquito?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you find a rabbit in the given picture?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

How many triangles can you count in the figure given?