In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

You can see three almost identical images below. Can you spot the odd one out from them?

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

O T T F F S S ?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

What's the only room from which no one can enter or leave

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you count the number of triangles in the given picture?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

What number when divided in half becomes zero?

Can you identify the famous TV character from the rebus below?