Calculate the **highest power of 5 in 10!**

Let’s see how layman will solve this question

10! can be written as:**10! = 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1**

Now you have to look for numbers which contain 5 (i.e. that ends with 5 or 0)

So there are only two numbers that contain 5.**Hence the highest power of 5 in 10! is 2**

**This old method is time taking. We can use shortcut method to quickly solve this question**

**SHORTCUT METHOD**

**Find highest power of 5 in 127!**

One can easily solve this question using shortcut method.

See the illustrations below

So, highest power of 5 in 127! **is 31**