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If 54 + 43 = 2, 60 + 51 = 10, then 62 + ...

If 54 + 43 = 2, 60 + 51 = 10, then 62 + 72 = ?

A

30

B

18

C

20

D

9

Text Solution

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The correct Answer is:
D
`5 - 4 = 1 , 4 - 3 = 1`
`1 + 1 = 2 `
`6 - 0 = 6 , 5 - 1 = 4 , 6 + 4 = 10 , 6 - 2 = 4 , 7 - 2 = 5 `
`4 + 5 = 9`
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