If 5 A × A = 399, then the value of A is(a) 3 (b) 6 (c) 7 (d) 9 – InterviewSolution

1.

If 5 A × A = 399, then the value of A is(a) 3 (b) 6 (c) 7 (d) 9

Answer»

The correct answer is option (c) 7

Explanation:

In the 1’s place, the product of A and A gives 9

Here, A is a number whose multiplication gives the two digit number having 9 in its 1’s place.

So, the product of 7 and 7 gives 49, where 1’s place is 9.

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