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The ten's digit of a two-digit number exceeds its unit's digit by 4. If the ten's digit and the unit's digit are in the ratio, find the number.

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answer is A.

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Detailed Solution

Concept: concept in this question is we need to remember that when a two digit number is formed, 10 has to be multiplied to the tens digit. A two digit number is the sum of multiplied to the tens digit and the units digit.
A/q to question : we know

And

So,

We will now simultaneously solve (1) and (2),

Substituting the above equation in (2), we get

Therefore, the required number is

Hence, the correct answer is option (1).

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