[X] Privacy Policy + T&C We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. You also agree to our T&C.
 [X] Common Answers Have you entered November's Common Answers?

Given five zeroes, using any mathematical operations, can you make a total of 120?

Can it be done with just four zeroes?

[Ref: ZHIL]

Answer: (0! + 0! + 0! + 0! + 0!)! = 120.

Since 0! = 1 we have (1 + 1 + 1 + 1 + 1)! = 5! = 1 x 2 x 3 x 4 x 5 = 120, as required.

Where ! means factorial, and where factorial means you take all numbers from 1 to your number and multiply them together.

For example:

0! = 1             (by convention)
1! = 1
2! = 1 x 2 = 2
3! = 1 x 2 x 3 = 6
4! = 1 x 2 x 3 x 4 = 24
.
.
.
10!= 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 = 3,628,800.

With just four zeroes it can be done using: ((0! + 0! + 0!)! - 0!)! = 120.

Back to the puzzles...

Top 10 Illusions

 Shadow Illusion Level Balance? Same Length Red Lines? Spinning Dancer Purple Nurple

We use cookies to personalise our content and ads, and for traffic analysis. Information about your use of our site is shared with our advertising and analytics providers. For more information please view our privacy policy. By using the site you also agree to our terms and conditions.