GMAT Club Tests | Re: D01-11

Helloumg ,

I too had the same concern. I did some digging on this and found some interesting properties. You too may find them useful.

Sum of individual sums of a number is called Digit sum or Beejank (in Vedic maths). One shortcut to quickly arrive at the digit sum is to simply ignore 9's. Let me take the first option - 94123. The Digit sum is -9 +4 + 1 +2 +3 = 1 (Simply strike out the digit 9 or the numbers that add up to 9. You can try it on others options and find that this holds true.

While
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