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Question

If half a number when added to the same number gives 120, then find the number.



Your Answer
A

100

Correct Answer
B

80

Your Answer
C

60

Your Answer
D

40


Solution

The correct option is B

80


Let the number be x.

Half of the number = x2

According to the question, 

x2+x=120

3x2=120

x=120×23

x=80

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