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Algebra
Arithmetic Progressions, Sum of Series
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Grade 12

Question:

The sum of the first 10 natural numbers is:
A. 45
B. 50
C. 55
D. 60

Step-by-Step Solution

Key Concept: Sum of first n natural numbers = n(n+1)/2.
Step 1: Sum = 10×11/2 = 55.
Correct Answer: C
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