You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Replace the question mark with the correct number in below Picture:

What is the word or phrase?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

What does below rebus means ?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?