Correct option is C
Given: (16, 169, 3), (18, 121, 7), (21, 361, 2), (6, 4, 4)
Logic: Middle number = (First number - Third number)²
(16, 169, 3):
169=(16−3)2=132=169(Correct!)
(18, 121, 7):
121=(18−7)2=112=121(Correct!)
(21, 361, 2):
361=(21−2)2=192=361(Correct!)
(6, 4, 4):
4=(6−4)2=22=4(Correct!)
Now, check the options:
(a) (17, 142, 5):
142≠(17−5)2=122=144(Incorrect!)
(b) (8, 4, 2):
4≠(8−2)2=62=36(Incorrect!)
(c) (13, 16, 9):
16=(13−9)2=42=16(Correct!)
(d) (15, 121, 3):
121≠(15−3)2=122=144(Incorrect!)
Thus, the correct option (c) (13, 16, 9)
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