What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?
Answers.
A) 20 18 48 61 B) 50 18 48 62 C) 10 18 48 68 D) 30 18 48 66 E) 40 18 48 69
D   30 18 48 66.   Starting at the top, add pairs of numbers in each column to arrive at the next number.
<result>D</result>
What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?