WBCS.LIVE practice question

What is the value of 1 + 2 + 3 + ... + 100?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 5050
  2. 5000
  3. 5150
  4. 5100

Correct answer and explanation

Correct answer: 5050

Explanation: ✅ Correct Answer: (A) 5050 📚 Explanation: Step-1: Use the formula for the sum of the first 'n' natural numbers: S = [n(n+1)] ÷ 2. Step-2: Here, n = 100. So, S = [100 x (100 + 1)] ÷ 2. Step-3: S = (100 x 101) ÷ 2 = 50 x 101 = 5050