A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

What always comes into a house through the keyhole?

Can you count the number of lines in the below picture?

People make me, save me, change me, raise me. What am I?

In the image below, can you find the value of an angle(y)

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What makes this number unique: 8,549,176,320?

A man dies of old age on his 25 birthday. How is this possible?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?