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1 . If the sum of two numbers is 33 and their difference is 15, the smaller number is :

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Answer: Option A

Explanation:

Let, the numbers are x and y

According to question,

x + y = 33.......(1)

x - y = 15.......... (2)

(1) + (2) = 2x = x = 24.

again , x + y = 33 (1)

x - y = 15...... (2)

(1) - (2) = 2y = 18

y = 9

So, smallest number is 9

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