12 17 32 57 ? 137 a) 98 b) 95 c) 37 d) 92 e) none of these

12 17 32 57 ? 137
a) 98
b) 95
c) 37
d) 92
e) none of these
by

1 Answer

Answer :

The pattern of the number series is
12+5×1=17, 17+5×3=32, 32+5×5=57
57+5×7=92, 92+5×9=137
Answer: d)
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