A) 49
B) 50
C) 60
D) 60
Correct Answer: D
Solution :
The sum of numbers at the extremities of the three line segments in each figure is same. In fig. \[\left( A \right),\text{ }39+33\text{ }=29+43\text{ }=27+45\text{ }=72\] In fig. \[\left( B \right),\text{ }42+31\text{ }=29+44=30+43\text{ }=73\] Let the missing number in fig. (C) be x. Then,\[x+10=59+20=40+39=79\]or\[x=69.\]
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