Multiple choice

Which value is wrong in the following sequence? 10 12.5 27.5 85 342.5 1725 10292.5

  1. 27.5

  2. 85

  3. 342.5

  4. 1725

  5. 10292.5
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is: next term = previous term × n + 2.5, where n increases by 1 (1.25, 2, 3, 4, 5...). 10×1.25=12.5, 12.5×2+2.5=27.5, 27.5×3+2.5=85, 85×4+2.5=342.5. Then 342.5×5+2.5=1715, not 1725.

Keep practicing — related questions