## An easy technique to reduce any number to a single digit sum

## What does Single Digit Sum mean?

Any number (*say 3456*) to be equated to a single digit sum, we just add all the digits together (*3+4+5+6 = 18*) until they become a single digit (*1+8=9*). i.e. less than 10

## What is this article trying to achieve?

This article explains a shortcut method to find the single sum for any number through a simple…