Question 14
Determine the number that shall come in place of ? in the given series:
8 13 10 15 12 ?
Solution
In the given series, 8 13 10 15 12, the difference between the numbers are in the form of 5, -3, 5, -3 etc in the alternate form.
Difference between 8 and 13 = 5
Difference between 13 and 10 = -3
Difference between 10 and 15 = 5
Difference between 15 and 12 = -3
Hence, the difference between 12 and the next number must be 5.
So, the required number is 17.
Option E.
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