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Question

(47−712)+12 equals


A

53

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B

42

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C

40

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D

54

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Solution

The correct option is C

40


We know that (xy)+z=x(yz), for all numbers x, y, z with y>z.

Since the above is true for all the numbers, it must be true for x=47, y=712 and z=12 also, as y=712>12=z

So, (47712)+12 = 47(71212) = 47(15212) = 477 = 40


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