Shortcut to multiply any number from 30-39 by 5

Shortcut to multiply any number from 30-39 by 5

In the previous post we learnt how to multiply any number from 20 to 29 by 5 in seconds.Today we are going to learn another amazing trick to multiply any number from 30 to 39 by 5 in seconds.

Let us see the steps

Step 1: Assume the base as 30

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 to get final answer.

Now lets consider a few examples to understand better

Example 1:32 x 5 = ?

Step 1:We assume the base as 30.

Step 2:Multiplying the base by 5
We get 30 x 5 = 150

Step 3:Multiplying the unit place digit by 5
We get 2 x 5 =10

Step 4:Adding results obtained in step 2 and step 3
We get 150 + 10 = 165

Ans 32 x 5 = 165

Example 2:37 x 5 = ?

Step 1:We assume the base as 30.

Step 2:Multiplying the base by 5
We get 30 x 5 = 150

Step 3:Multiplying the unit place digit by 5
We get 7 x 5 = 35

Step 4:Adding results obtained in step 2 and step 3
We get 150 + 35 = 185

Ans 37 x 5 = 185

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