If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

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 find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

How is the moon similar to a dollar?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

How can one talk without saying a single word?