Question

Find the odd one out from the following series: 5, 10, 20, 40, 100, 150, 200

• A. 10
• B. 40
• C. 100
• D. 150

Hint:

Remember: When solving series puzzles, look for arithmetic or geometric progressions and identify any term that doesn’t follow the pattern.

Answer 1

The Correct Option is D

The given series is 5, 10, 20, 40, 100, 150, 200. To find the odd one out, let's examine the pattern:

• 5 to 10: multiplied by 2
• 10 to 20: multiplied by 2
• 20 to 40: multiplied by 2
• 40 to 100: here, it breaks the pattern of multiplication by 2. Instead, it's multiplied by 2.5
• 100 to 150: seems arbitrary
• 150 to 200: addition of 50

To maintain a consistent pattern, each term should ideally follow a consistent multiplication rule. The sudden changes at 150 indicate it doesn't fit this sequence behaviorally. Given this, the odd number out is 150.