Number series – next term via halving decrements: 656, 432, 320, 264, 236, ?
Aptitude
Odd Man Out and Series
Difficulty: Easy
Choose an option
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A222
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B229
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C232
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D223
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E226
Answer
Correct Answer: 222
Explanation
Introduction / Context:The successive subtractions halve each time: −224, −112, −56, −28, … Continue the pattern to find the next term.
Observation / Approach:
- 656 → 432: −224
- 432 → 320: −112 (half of 224)
- 320 → 264: −56 (half of 112)
- 264 → 236: −28 (half of 56)
Step-by-Step Solution:Next decrement = −14 (half of 28) ⇒ 236 − 14 = 222.
Verification / Alternative check:The halving continues neatly: 224, 112, 56, 28, 14, …
Why Other Options Are Wrong:229, 232, 223, 226 do not correspond to subtracting 14 from 236.
Common Pitfalls:Switching to ratio-based reasoning; here the pattern is strictly on the differences.
Final Answer:222