Can you move 2 matchsticks to form four equal sized squares.

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

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Can you decipher the two rows to find the hidden word?

Imagine you are in a room with no windows or doors. How will you get out?