What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

Rearrange the letters in "new door" to make one word.

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 man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

In which direction should the missing arrow point?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

How can you make number one disappear by adding something to it?

What is the coolest letter in the alphabet?