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Instructions
What will come in place of question mark (?) in the given number series ?
Solution
if n is the number denoting the position of the term then each term can be represented by
(n-1)th term $$\times$$ (n-1) - (n-1)
7 is the second term. n=2
(n-1)th term is 8.
8 $$\times$$ 1 -1 =7
For 12 n=3
7 $$\times$$ 2 -2 = 12.
Similarly for the 6th term n=6
128 $$\times$$ 5 - 5 = 635
Option C is the correct answer.
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