Which tank will fill first?

What makes this number unique: 8,549,176,320?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

What does this rebus riddle means ?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

How can you tell a raw egg from a hard-boiled egg?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?