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What should come in place of the question mark? 9, 10, 18, 45, 109, ?

Competition practiceNumber Series

A234
B221
C238
D209

Step-by-Step Solution

Differences are

1^{3}, 2^{3}, 3^{3}, 4^{3}

(1, 8, 27, 64), so the next is +

5^{3} = 125 : 109 + 125 = 234

.

Answer: A) 234

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