If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Which is heavier: a ton of bricks or a ton of feathers?

Can you count the number of children in the picture below

During which month do people sleep the least?

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

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