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?

Before Mount Everest was discovered, what was the highest mountain in the world?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What kind of band never plays music?

Can you solve below mathematical equation?

2^1234 - 2^1233

Eight of us go fourth, not back, to protect our king from an attack. What are we?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E