(121-196) , (144-225) , (36-83) , (16-49)
Option:
Justification: In 36-83, ?83 is not square number. Every other pair is square of a number.
Choose or find odd number pair
A. 121-196
B. 144-225
C. 36-83
D. 16-49
Answer: C . 36-83
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