Multiple choice

Find the wrong term in the following number series: 378, 192, 288, 720, 2520, 11340

  1. 2520

  2. 11340

  3. 378

  4. 720

  5. 288
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C Correct answer
Explanation

The series follows the pattern where each term relates to the next through multiplication by an increasing fraction: 378×0.5=189≈192, 192×1.5=288, 288×2.5=720, 720×3.5=2520, 2520×4.5=11340. However, 378×0.5=189, not 192. The first term 378 breaks the pattern that works perfectly from 192 onwards. The correct first term should be 192÷0.5=384 or the relationship starts from 192.

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