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?

How many triangles can you find in this given picture?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

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

Solve this riddle by finding the odd one out from the rest.

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Who is that with a neck and no head, two arms and no hands? What is it?