Question
10 625 50 125 250 25
? What should come in the place of question mark (?) in the following number series?Solution
There are two series in this number series.
First group is (10, 50, 250) and second is (625, 125, 25).
Both are of the nature (×5, ÷5) and (×5, ÷5) alternatively. Hence the next number in this series is 250 × 5 = 1250.
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