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

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?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What can you see in the middle of March and April that you can never see in any other month?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

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?

Find the missing number in the image below.

Can you move 2 matchsticks to form four equal sized squares.