Multiple choice

Directions: Find the missing term in the following number series: 999, 1000, 996, 1005, ?

  1. 989

  2. 991

  3. 1021

  4. 1093

  5. 1102
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A Correct answer
Explanation

The pattern is: +1, -4, +9, -16. The squares are added and subtracted alternately. 1005 - 16 = 989.

AI explanation

The series alternates by adding consecutive integers and then subtracting the next consecutive integers: +1, -4, +9, and so on. Following this pattern of squares, the next operation is subtracting 16, which gives us 1005 - 16. The result is 989.

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