Difficulty: Easy
Correct Answer: 343
Explanation:
Introduction / Context:
The sequence lists perfect cubes of consecutive natural numbers. Identifying which n^3 comes after 216 resolves the item. Cube recognition up to 7^3 is widely used in aptitude questions.
Given Data / Assumptions:
Concept / Approach:
Since 216 is 6^3, the next cube is 7^3. Compute 7^3 by multiplying 7 * 7 * 7 to obtain 343.
Step-by-Step Solution:
6^3 = 216Next n = 7 ⇒ 7^3 = 7 * 7 * 7 = 343
Verification / Alternative check:
Sequence thus continues: 1, 8, 27, 64, 125, 216, 343 — consecutive cubes from 1 to 7.
Why Other Options Are Wrong:
354/392/245 are not perfect cubes and do not match the consecutive-cube pattern.
Common Pitfalls:
Confusing cubes with squares; for example, 256 is 4^4, not in this list. Accurate recall of small cubes helps avoid mistakes.
Final Answer:
343
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