Prove that twice of ten is the same as twice of eleven.

What is the next number in the series?

15 29 56 108 208 ?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

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

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

Can you solve the maths in the below-given picture equation?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?