A) 49
B) 72
C) 64
D) 81
Correct Answer: C
Solution :
The sum of the first 8 odd number = 1, 3, 5........... \[=\frac{8}{2}(2\times 1+(8-1)2)\] \[=4(2+14)\] \[=4\times 16=64\]
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