Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I look at you, you look at me I raise my right, you raise your left. What am I?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

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

What always comes into a house through the keyhole?

Can you tell a 3D object that has just two surfaces?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?