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Multiple choice

Which number is wrong in the given series? 1, 9, 25, 50

  1. 1

  2. 25

  3. 50

  4. 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series should be squares of odd numbers: 1²=1, 3²=9, 5²=25, 7²=49. The number 50 breaks this pattern. If it followed the rule, the fourth term should be 49, not 50.

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Practice this chapter

  • Number Series (2662 questions)
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