Insert the missing number.
2, 6, 12, 20, 30, 42, 56,72 (....)
Options.
A) 22 B) 38 C) 72 D) 66 E) 90
Explanation:   The pattern is 1 x 2, 2 x 3, 3 x 4, 4 x 5, 5 x 6, 6 x 7, 7 x 8, 8 x 9   So, the next number is 9 x 10 = 90.   Answer: 90) 90
<result>E</result>
Insert the missing number.
2, 6, 12, 20, 30, 42, 56,72 (....)