| 1 | 4 | ? |
| 4 | 2 | 5 |
| 2 | 2 | 3 |
| 49 | 64 | 169 |
A) 3
B) 6
C) 5
D) 4
Correct Answer: C
Solution :
The square of the sum of the first three numbers in each column is equal to the lowermost number, 1st Column \[{{(1+4+2)}^{2}}\text{=(7}{{\text{)}}^{2}}=49\] 2nd Column \[{{(4+2+2)}^{2}}\text{= (8}{{\text{)}}^{2}}=64\] 3rd Column \[\sqrt{169}=13\] Or, \[?+5+3=13\] Or, \[?=13-8=5\]
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