Correct Answer is : Noneof these

NIACL Model Paper 7 with solutions for free online practice

Question : 43 of 100

Marks: +1, -0

1 121 441 961 1681 ?

Solution:

(5) The pattern is :

1^2 = 1; 11^2 = 121

21^2 = 144; 31^2 = 961

41^2 = 1681

∴

? = 51 ^2 = 51 × 51 = 2601

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