Multiply by 5?

Ok…you gonna enjoy this post!

Wanna multiply a huge no. by 5?

As simple as this:

If given number is even:

1. Divide the number by 2.

2. Add a zero to the resulting number.

E.g. 98422 * 5 = ?

98422 / 2 = 49211

Now add a zero!

ans = 492110

If given number is odd:

1. First, subtract the number by 1.

2. Divide by 2

3. Add a five to the result

E.g. 1190865 * 5 = ?

Subtract by 1 => 1190864

Divide by 2 => 595432

Add a five => 5954325

Cheers,

aishwarya 🙂

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