WBCS.LIVE practice question

Find the missing number in the series: 5, 10, 20, 40, ?

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

Answer options

  1. 60
  2. 80
  3. 100
  4. 50

Correct answer and explanation

Correct answer: 80

Explanation: āœ… Correct Answer: B) 80 šŸ“š Explanation: This is a straightforward geometric series where every number is multiplied by exactly 2 to generate the next term. The pattern is 5 Ɨ 2 = 10, 10 Ɨ 2 = 20, and 20 Ɨ 2 = 40. Therefore, the next logical step is to multiply 40 by 2, which results in exactly 80.