Reply To: Challenge Questions – 2

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#31183
KennethWilliams
Keymaster

Challenge Question 13

In Challenge Question 11 we looked at products like 47 x 67 (where the first figures add up to 10 and the last are the same), and the method was 4×6+7 / 7×7 = 3149.

How can this method be used to find 57 x 37?

[[perhaps this question should be barred]]

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