Question 47
Which number will replace the question mark? in the below mentioned series;
17, 37, 77, 157, 317, ?
Solution
The difference between consecutive terms keeps on getting double.
37 - 17 = 20
77 - 37 = 40
157 - 77 = 80
317 - 157 = 160.
so, the next term should be 317 + 320 = 637.
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