Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Out of four images which one is the odd one out?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Solve the puzzle by telling what does below picture means.

The centre of the third figure is empty. What digit should fit inside?