Q243
Find the missing number?
Find the missing number?


A.
2
B.
5
C.
9
AnswerD.
13
Answer: Option C
Solution
Answer: Option C
Solution:
Using the top two grids as a source, numbers in the lower left grid equal the sums of numbers in corresponding positions of the top two grids, subtracting 1 each time, and numbers in the lower right grid equal the differences between numbers in corresponding positions of the top two grids, adding 1 each time.