Quantitative Aptitude • Ratio, Average & MixtureEasy
What is the average of the first 51 odd numbers?
A. 51✓ Correct Answer
B. 52
C. 101
D. 25.5
💡 Solution & Explanation
The sum of the first n odd numbers is n², so here it is 51² = 2601. Average = 2601 ÷ 51 = 51. For any evenly spaced list, the average is also the middle of the first and last numbers.
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