Multiple choice

DIRECTIONS: Find the missing numbers/letters in following series. 15, 20, 35, 42, 63, ?

  1. 72

  2. 61

  3. 85

  4. 98
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pattern: 15+5=20, 20*1.75=35, 35+7=42, 42*1.5=63. This is not consistent. Alternative: 15+5=20, 20+15=35, 35+7=42, 42+21=63. Differences are 5, 15, 7, 21. Pattern in differences: 5*3=15, 7*3=21. Next difference should be 9. 63+9=72.

Keep practicing — related questions