NTSE Stage 2 MAT 2015 Question Paper

Question : 18 of 100

Marks: +1, -0

Identify the missing number in the following sequence 2, 17, 52, ___, 206

Solution:

(11)^2-(9)^2=121-81=40

(15)^2-(7)^2=225-49-176

(25)^2-(21)^2=625-441

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