Why is 6 afraid of 7?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What has 88 keys?

What number should come in place of the question mark below?

Solve the puzzle by telling what does below picture means.

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Can you replace the question mark with the correct number in the below table sequence?

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

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