Select the option that will fill in the blank and complete the given series.
7, 16, 40, 84, _____, 252
Ā Given seriesĀ 7, 16, 40, 84, _____, 252
we take difference 16-7 = 9, 40-16= 24, 84- 40 = 44 .,...... and so on
Again we take a difference of differenceĀ 24-9 = 15, 44- 24 = 20,Ā and next 25 and next 30 and so onĀ
then add 44 + 25 = 69 (difference of nextĀ series numberĀ )
therefore 84 + 69 = 153 AnsĀ
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