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1 . The ratio of two numbers is 7:4, if 8 is added to both the number ration becomes 13:8 what is the smaller number?

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Answer: Option A

Explanation:

Let's 7x and 4x be two number.

Now, 7x + 8:4x + 8 = 13:8

Or, 52x + 104 = 56x + 64

Or, 56x - 52x = 104 - 64

Or, 4x = 40

Or, x = 10

So small number is 4x = 4×10 = 40

Or, x

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