Question 17
Select the number that can replace the question mark (?) in the following series.
105, 107, 103, ?, 101, 111
Solution
Given series 105, 107, 103, ?, 101, 111
the given series is mixed two series
first 105-2 = 103 and 103-2 101
second is 107+2 = 9 and 109+2= 111
therefore ? 107+2 = 109 Ans
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