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Question

The sum of two number is 10 and their positive difference is 2. The bigger number is .....................

A
8
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B
4
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C
2
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D
6
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Solution

The correct option is D 6
Let x and y be two numbers such that x>y
Then x+y=10 ...... (i) and xy=2 ...... (ii)
Solving them
2x=12x=6 and 4+y=10y=4
Thus, the bigger number is 6.

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