5 | 9 | 8 | 7 |
8 | 6 | 9 | 10 |
7 | 13 | ? | 19 |
5 | 7 | 8 | 9 |
A) 9
B) 10
C) 12
D) 15
Correct Answer: D
Solution :
In the first column, \[(5+8+7)\div 4=5\]. In the second column, \[(9+6+13)\div 4=7\]. In the fourth column, \[(7+10+19)\div 4=9\]. Let the missing number be x. Then, in the third column, we have: \[(8+9+x)\div 4=8\]\[\Rightarrow \]\[17+x=32\]\[\Rightarrow \]\[x=15\].You need to login to perform this action.
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