Continue the pattern of increasing even increments: 2, 6, 12, 20, 30, 42, 56, ( … )
Aptitude
Odd Man Out and Series
Difficulty: Easy
Choose an option
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A60
-
B64
-
C72
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D70
Answer
Correct Answer: 72
Explanation
Introduction / Context:This additive series increases by consecutive even numbers. Recognizing the difference pattern is key to projecting the next term correctly.
Given Data / Assumptions:
- Series: 2, 6, 12, 20, 30, 42, 56, …
- Differences look like +4, +6, +8, +10, +12, +14.
Concept / Approach:List successive differences. If they are consecutive even numbers starting from 4, extend with the next even number to get the missing term.
Step-by-Step Solution:6 − 2 = 412 − 6 = 620 − 12 = 830 − 20 = 1042 − 30 = 1256 − 42 = 14Next difference = 16 ⇒ Next term = 56 + 16 = 72
Verification / Alternative check:Even-difference ladders are common: starting at 4 and adding 2 each step reproduces every jump perfectly, confirming 72.
Why Other Options Are Wrong:
- 60 / 64 / 70: imply differences of 4, 8, or 14 again; only +16 continues the rising-even pattern.
Common Pitfalls:
- Guessing the next term from a visual trend without calculating differences, which can be misleading.
Final Answer:72