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1. What is the next number in the series? 8, 11, 17, 24, 29, 53, 78, ....

  • A. 102
  • B. 102
  • C. 102
  • D. 102

Answer: Option B

Explanation:


difference between the numbers are respectively 3,6,7,5,24,25

Now, according to 6-7-5,

7-2=5, two number less than previous one

So, this must be 24-25-23 (25-2=23). 

Now, 78+23=101.

(ans).


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