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Which number will replace the question mark (?) in the following series? 10, 15, 25, 45, 85, ?
Question

Which number will replace the question mark (?) in the following series?
10, 15, 25, 45, 85, ?

A.

160

B.

165

C.

170

D.

150

Correct option is B

Given - 10, 15, 25, 45, 85, ?

Logic: Each term = (Previous term × 2) - 5
Explanation (applied left to right):
10 → 15 = (10 × 2) - 5 = 15
15 → 25 = (15 × 2) - 5 = 25
25 → 45 = (25 × 2) - 5 = 45
45 → 85 = (45 × 2) - 5 = 85
85 → ? = (85 × 2) - 5 = 165
Final Answer:
The missing number is 165.
Final Correct Option:
(B) 

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