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. Which of the following numbers will replace the question mark (?) in the given series? 7, 7, 10, 50, 57,?
Question

. Which of the following numbers will replace the question mark (?) in the given series?
7, 7, 10, 50, 57,?

A.

345

B.

225

C.

513

D.

114

Correct option is C

Given:
7, 7, 10, 50, 57,?
Logic: Multiply by 1, add +3, multiply by 5, add +7, multiply by 9 to the series, starting from the first number, and focusing on the odd-number pattern
×\times 1= 7
7+3 = 10
10 × 5= 50
50 +7 = 57 
Next pattern should be - 
57 × 9 = 513
Thus, correct answer is (c) 513

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