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?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Can you divide the below-given shape into four equal and identical pieces?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What has many teeth, but cannot bite?