Quantitative Aptitude • Ratio, Average & MixtureEasy
What is the average of the first 24 natural numbers?
A. 12
B. 12.5✓ Correct Answer
C. 25
D. 24
💡 Solution & Explanation
The sum of the first n natural numbers is n(n + 1)/2 = 24 × 25 ÷ 2 = 300. Average = 300 ÷ 24 = 12.5. For any evenly spaced list, the average is also the middle of the first and last numbers.
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