What work can one never finish?

Bay of Bengal is in which state?

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

Replace the question mark with the correct number below.

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 discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?