Multiple choice

In the following number series only one is wrong. Find out the wrong number. 33 321 465 537 573 590 600

  1. 321

  2. 465

  3. 573

  4. 537

  5. 590
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E Correct answer
Explanation

Pattern: 33 + 288 = 321, 321 + 144 = 465, 465 + 72 = 537, 537 + 36 = 573, 573 + 18 = 591, 591 + 9 = 600. The additions halve each time: 288, 144, 72, 36, 18, 9. The number 590 breaks this pattern - should be 591.

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