Where do fish keep their money?

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?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

You see me once in June, twice in November, and not at all in May. What am I?

What kind of storm is always in a rush?

I’m tall when I’m young, and I’m short when I’m old. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

If 1+9+8=1, what is 2+8+9?

What does this mean?

CCCCCCC