What is black when you buy it, red when you use it, and gray when you throw it away?

You bought me for dinner but never eat me. What am I?

I have eight fingers and two thumbs but I do not live. What Am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Can you find out the missing number in the grid?

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

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

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

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

What number comes next in the series?

5 15 5 18 5 24 14 20 _