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What is the sum of the first 10 positive integers?

Practice Questions

Q1
What is the sum of the first 10 positive integers?
  1. 45
  2. 50
  3. 55
  4. 60

Questions & Step-by-Step Solutions

What is the sum of the first 10 positive integers?
Correct Answer: 55
  • Step 1: Identify the first 10 positive integers. They are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
  • Step 2: Use the formula for the sum of the first n positive integers, which is n(n + 1)/2.
  • Step 3: In this case, n is 10. So, plug 10 into the formula: 10(10 + 1)/2.
  • Step 4: Calculate 10 + 1, which equals 11.
  • Step 5: Now multiply 10 by 11, which equals 110.
  • Step 6: Finally, divide 110 by 2, which equals 55.
  • Step 7: Therefore, the sum of the first 10 positive integers is 55.
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