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?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

When 99 is considered higher than 100?