WBCS.LIVE practice question

Find the missing number in the series: 2, 6, 12, 20, 30, ?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 40
  2. 42
  3. 44
  4. 46

Correct answer and explanation

Correct answer: 42

Explanation: āœ… Correct Answer: (B) 42 šŸ“š Explanation: Step-1: Look at the difference between consecutive numbers. 6 - 2 = 4; 12 - 6 = 6; 20 - 12 = 8; 30 - 20 = 10. Step-2: The differences are increasing by 2 (4, 6, 8, 10...). Step-3: The next difference should be 12. So, 30 + 12 = 42. (Alternatively: 1x2, 2x3, 3x4, 4x5, 5x6... next is 6x7 = 42).