Question

the ones digit in the square of 9817 is
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Answer 1

Answer:

Method 1: Direct multiplication

9817*9817=96373489

9 is in the ones' digit.

2: Without multiplication:

In 9817, the last number is 7

We know 7*7 = 49, and 9 is in the last digit, hence 9 is the answer, because, when you multiply the other digits, they don't get added to the units place.