Arithmeticmedium · Past Paper
If x:y = 3:1, then (x^3 - y^3) : (x^3 + y^3) is:
A13:14
B14:13
C10:11
D11:10
✓ Correct Answer: A — 13:14
(3^3 - 1^3) : (3^3 + 1^3) = (27-1) : (27+1) = 26:28 = 13:14.
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