In following number series, two terms have been put within brackets. Choose the appropriate option
2,6,12,20,30,42,56,x
Option:
A. 60
B. 64
C. 70
D. 72
Answer: D . 72
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Justification:
The sequence is 1 * 2 , 2 * 3, 3 * 4, 4 * 5.
Next number = 8 * 9 = 72
