Which of the following are correctly paired?
A. Number 1331, Cube Root 11
B. Number 729, Cube Root 9
C. Number 510, Cube Root 8
D. Number 215, Cube Root 5
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A and B only
A pair is correct only if the cube of the root equals the number.
A. Number 1331, Cube Root 11 Correct. \(11^3=1331\).
B. Number 729, Cube Root 9 Correct. \(9^3=729\).
C. Number 510, Cube Root 8 Incorrect. \(8^3=512\), so 510 is not a perfect cube.
D. Number 215, Cube Root 5 Incorrect. \(5^3=125\); 215 is not a perfect cube (\(6^3=216\)).