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- Identify the first relation/pattern.
- Apply the same rule to the missing part.
- Reject options that break the rule.
Correct Answer: B
Correct Answer: B
Method / Topic: Series
The correct option preserves the same pattern.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Series
Look at the difference between consecutive terms. 11-6=5, 21-11=10, 41-21=20, and 81-41=40. The difference is doubling each time: 5, 10, 20, 40. So the next difference should be 80. Therefore, the next number is 81+80=161. Think of it like a small jump becoming double each time on a number line.
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Identify the first relation/pattern.
- Apply the same rule to the missing part.
- Reject options that break the rule.
Find the missing number in the series: 6, 11, 21, 41, 81, ?
Explanation
Correct Answer: B
Method / Topic: Series
The correct option preserves the same pattern.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Series
Look at the difference between consecutive terms. 11-6=5, 21-11=10, 41-21=20, and 81-41=40. The difference is doubling each time: 5, 10, 20, 40. So the next difference should be 80. Therefore, the next number is 81+80=161. Think of it like a small jump becoming double each time on a number line.
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