Multiple Choice Questions

Fill the missing number 78 64 48 30 10 ........

Quantitative Aptitude (IB) Number series

Fill the missing number ______ 78, 64, 48, 30, 10, (...)

-12

-14

78 - 14 = 64
64 - 16 = 48
48 - 18 = 30
30 - 20 = 10
10 - 22 = -12

Hence, option 1 is the correct answer.

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