Question

A B

+ +++ +
9 12 15 21 27 33
C D
++
42
What number does B stand for?
C
-
C
-
L
L

Answer 1

B = 24

Explanation:

we just need to work out the pattern the given numbers are following

from 9 to 12 is an addition on +3, likewise from 12 to 15 is an addition of +3

thus the following value will be 15 + 3 = 18 when we add 18 + 3 = 21

to get B we add 3 to 21

21 + 3 = 24