Instructions

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

Question 174

7 8 4 13 -3 22 ?

Solution

Clearly ,

7 + 1^{2} = 8
8 - 2^{2} = 4
4 + 3^{2} = 13
13 - 4^{2} = -3
-3 + 5^{2} = 22

Hence , the next term must be in the format
22 - 6^{2} = -14

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