126 | 19 | 235 |
531 | 18 | 621 |
31 | ? | 24 |
A) 15
B) 18
C) 10
D) 14
Correct Answer: C
Solution :
\[1+2+6+2+3+5=19\] \[5+3+1+6+2+1=18\] Similarly, \[3+1+2+4=\underline{\mathbf{10}}\]You need to login to perform this action.
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