Reply To: Challenge Questions

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#29855
Satya
Participant

Hi, I was waiting for 24hrs to complete before posting the answer…Since Anupama has already posted her answer (as she got confused with the time zone) here is how I solved Challenge Question 5:

3 a b X 61 = 19947

Going by ‘Last by the Last’, I know that value of b has to be 7 as the unit place of answer is 7.

3 a 7 * 61 = 19947 –> now apply digit sums here

1+a * 7 = 3 [after casting out 9s while adding digit sums]

a has to be 2 for the above expression to be true –> 3 * 7 = 21 whose digit sum is 3.

So a = 2, b = 7 making the above 327 * 61 = 19947

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