Which number does not belong?
10, 20, 40, 55
Show answer & explanation
Correct answer: D
Explanation
Correct Answer: 55
A close look at this series reveals a certain pattern or rule:
10 × 2 = 20
20 × 2 = 40
According to this rule, each subsequent number is double the previous one. If we continue this sequence, the next number should have been:
40 × 2 = 80
Since 55 is after 40 in the series,