Multiple choice

Find the wrong number in the following number series? 7087.5 1578 450 180 120 240

  1. 1578

  2. 450

  3. 180

  4. 120

  5. 240
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern is: divide by 4.5, then divide by 3.5, then divide by 2.5, then divide by 1.5, then divide by 0.5. Checking: 7087.5 ÷ 4.5 = 1575 ✓; 1575 ÷ 3.5 = 450 ✓; 450 ÷ 2.5 = 180 ✓; 180 ÷ 1.5 = 120 ✓; 120 ÷ 0.5 = 240 ✓. The number 1578 in the options doesn't appear in this correct series, making it the wrong number to identify.

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