Multiple choice

Directions: Find the missing number in the following series: 9999, 8099, ?, 4899, 3599, 2499

  1. 7999

  2. 6499

  3. 6399

  4. 6999

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

The pattern is subtracting consecutive multiples of 1000, 900, 800, 700, 600... 9999 - 1900 = 8099; 8099 - 1700 = 6399; 6399 - 1500 = 4899; 4899 - 1300 = 3599; 3599 - 1100 = 2499. The differences are 1900, 1700, 1500, 1300, 1100.

AI explanation

The series is formed by subtracting consecutive multiples of 300 from the previous terms. The differences are 9999 minus 8099 equals 1900, and subsequently we subtract 1700, 1500, 1300, and 1100. Therefore, the missing term is 8099 minus 1700, which equals 6399.

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