0, 3, 9, 18, 30, 45, 63, ?
What number should replace the question mark? Select:
A) 78  B) 74  C) 79  D) 72  E) 84
84 84
add 3,6,9,12,15,.....
<result>E</result>
0, 3, 9, 18, 30, 45, 63, ?
What number should replace the question mark?