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Which of the following numbers will replace the question mark (?) in the given series?9, 54, 59, ?, 239 , 478​​
Question

Which of the following numbers will replace the question mark (?) in the given series?
9, 54, 59, ?, 239 , 478​​

A.

230

B.

232

C.

234

D.

236

Correct option is D

​​Series: 9, 54, 59, ?, 239, 478
Logic: alternate multiplication and addition, decreasing the multiplier/addition each time.
9 × 6 = 54
54 + 5 = 59
59 × 4 = 236  (Missing number)
236 + 3 = 239
239 × 2 = 478
Thus, correct option is (d).

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