Multiple choice

The sum of all odd numbers between 200 and 300 is

  1. 11600

  2. 12490

  3. 12500

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The odd numbers between 200 and 300 are 201, 203, 205, ..., 299. This is an arithmetic progression with first term 201, last term 299, and 50 terms. Sum = n/2 × (first + last) = 50/2 × (201 + 299) = 25 × 500 = 12500.

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