Identify the 10 differences between the two given pictures.

What occurs twice in a week, once in a year but never in a day?

Where do fish keep their money?

What is the largest number you can write with just 3 digits?

Find the missing number in the series below

13 -21 34 -55 ? -144

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

How can you tell a raw egg from a hard-boiled egg?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?