Reply To: Challenge Questions

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#29887
KennethWilliams
Keymaster

Hi Savita,

The way to tackle this question is to first use the Last By Last Sutra. By looking at the last digits of the three numbers you can see that b must be 7, it cannot be any other number.

Then the digit sums will give the value of a.

Multiplication of 3-digit by 2-digit numbers is dealt with in lesson 21.

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