What is the Sum of First 70 Odd Numbers?
Correct answer: A. 4900
- A. 4900
- B. 4970
- C. 4960
- D. None of these
Explanation
The sum of the first n odd numbers is n² because the terms form 1 + 3 + 5 + ... + (2n - 1). For n = 70, the sum is 70² = 4,900. The likely wrong choice is 4,970, which is the sum of the first 70 even numbers, not the odd numbers.
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