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Question

13+(69)+57(89)(53+(49))=___


A

50

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B

60

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C

70

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D

80

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Solution

The correct option is B

60


13+(69)+57(89)(53+(49))

=1369+57+89(5349)

=1369+57+8953+49

On grouping all the positive terms and negative terms together, we get:

=(136953)+(57+89+49)

=135+195

=60


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