Multiple choice

Directions: In the following number series one number is wrong. Find out the wrong number. 2250, 2200, 2050, 1600, 450, -3800

  1. 2200

  2. 2050

  3. 1600

  4. 450

  5. 2250
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is a subtraction series: 2250 - 50 = 2200; 2200 - 150 = 2050; 2050 - 450 = 1600; 1600 - 1350 = 250 (not 450). The differences are 50, 150, 450, 1350 (multiplying by 3). Thus, 1600 - 1350 = 250, and 250 - 4050 = -3800. The number 450 is incorrect.

AI explanation

The differences between the terms are -50, -150, -450 and -1150, indicating the subtractions should follow a multiplication by 3 pattern. The correct differences should be -50, -150, -450, -1350 and -4050. Based on this, subtracting 1350 from 1600 gives 250, which means 450 is the wrong number.

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