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Quantitative Aptitude
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6, 17, 21, 47, ?, 107

Question

6, 17, 21, 47, ?,

107 What will come in place of the question mark (?) in the following series?

A 61 Correct Answer Incorrect Answer

B 51 Correct Answer Incorrect Answer

C 71 Correct Answer Incorrect Answer

D 81 Correct Answer Incorrect Answer

E 91 Correct Answer Incorrect Answer

Solution

6 × 2 + 5 = 17 17 × 1 + 4 = 21 21 × 2 + 5 = 47 47 × 1 + 4 = 51 51 × 2 + 5 = 107

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