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select the missing number from the given...

select the missing number from the given alternatives :
1, 25, ?, 361, 841, 1681

A

169

B

225

C

161

D

121

Text Solution

Verified by Experts

The correct Answer is:
D
`(1)^2 = 1`
`(3)^2 = 9`
`(5)^2 = 25`
`(11)^2 = 121`
`(19)^2 = 361`
`(29)^2 = 841`
`(41)^2 = 1681 `
Now,
1 + 2 = 3
3 + 2 = 5
5 + 6 = 11
11 + 8 = 19
19 + 10 = 29
29 + 12 = 41
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