# Shortcut to multiply any number from 20-29 by 5

In the previous post we learnt how to multiply any number from 10 to 19 by 5 in seconds.Today we are going to learn another cool trick to multiply any number from 20 to 29 by 5 in seconds.

Let us see the steps
Step 1: Assume the base as 20

Step 2: Multiply the base by 5

Step 3:Multiply the unit place digit by 5

Step 4:Add the results obtained in step 2 and step 3

Now lets consider a few examples to understand better

Example 1:21 x 5 = ?

Step 1:We assume the base as 20.

Step 2:Multiplying the base by 5
We get 20 x 5 = 100

Step 3:Multiplying the unit place digit by 5
We get 1 x 5 = 5

Step 4:Adding results obtained in step 2 and step 3
We get 100 + 5 = 105

Ans 21 x 5 = 105

Example 2:26 x 5 = ?

Step 1:We assume the base as 20.

Step 2:Multiplying the base by 5
We get 20 x 5 = 100

Step 3:Multiplying the unit place digit by 5
We get 6 x 5 = 30

Step 4:Adding results obtained in step 2 and step 3
We get 100 + 30 = 130

Ans 26 x 5 = 130