SSC CGL Model Paper 11

Question : 9 of 100

Marks: +1, -0

Which number w ill replace the question mark (?) in the following series ?
9, 22, 53, 122, ?

Solution:

9 ×2 +2^2=22

22×2+3^2=53

53×2+4^2=122

122×2+5^2=269

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