Instructions

What should come in place of the question mark (?) in the following series ?

Question 54

177 170 159 146 ? 110

Solution

The series follows pattern in which difference between successive terms is a prime number starting from 7.
177-7=170.
170-11=159.
159-13=146.
146-17=129.
129-19=110.
Hence, Option C is correct.


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