Multiple choice

The series given below has one wrong number find that number and answer the question. 3, 7.5, 15, 37.5, 75, 167.5, 375

  1. 7.5

  2. 75

  3. 37.5

  4. 15

  5. 167.5
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The series follows alternating multiplication: ×2.5, ×2, ×2.5, ×2, ×2.5, ×2. Verifying: 3×2.5=7.5, 7.5×2=15, 15×2.5=37.5, 37.5×2=75, 75×2.5=187.5 (not 167.5), 187.5×2=375. Therefore 167.5 is the wrong number.

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