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10: 099 :: 09 : ?...

10: 099 :: 09 : ?

A

49

B

80

C

69

D

79

Text Solution

Verified by Experts

The correct Answer is:
B
`(10)^2` - 1 = 100 - 1 = 99
Similarly
`(09)^2` - 1 = 81 - 1 = 80
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