BD Merit - Freelancing, BCS, Bank, Primary, Admission, NTRCA

1 . A two-digit number has 3 in its unit digit. The sum of its digits is one-seventh of the number itself. What is the number?

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Answer: Option B

Explanation:

Let the decimal placed digit be X.

Then the number is (10X + 3).

Again, X + 3 = (10X + 3) / 7

or, 7X + 21 = 10X + 3

or, 10X - 7X = 21 - 3

or, 3X = 18

or, X = 6

So, the number is 63.