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The sum of 100 terms of the series 1 - 3...

This question belongs to Arithmetic Ability Number System
Number System
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The sum of 100 terms of the series 1 - 3 + 5 - 7 + 9 - 11 .......... is:

Answer & Solution
Correct Answer: Option D
1 - 3 + 5 - 7 + 9 - 11 .......... + 197 - 199
= (- 2) + (-2) + (-2) + .......... + (-2) (50 times)
= 50 × (-2) = -100
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