Question

Find the sum first 20 consecutive natural numbers.

• A. 200
• B. 210
• C. 220
• D. 205

Answer 1

Answer:

B. 210

Read Explanation:

sum first n consecutive natural numbers =n(n+1)/2 sum first 20 consecutive natural numbers = 20(21)/2 = 10 × 21 = 210

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