Question
Select the number from among the given options that can
replace the question mark (?) in the following series. 33, 39, ?, 57, 69, 87Solution
11 X 3 = 33 13 X 3 = 39 17 X 3 = 51 19 X 3 = 57 23 X 3 = 69 29 X 3 = 87
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