The sum of two numbers is 15 and their product is 54. Find the two numbers.
A6 and 9CORRECT
B5 and 10
C7 and 8
D3 and 12
GCEMathematicsAlgebraic Processes2020
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Why the answer is A, and why the others tempt you.
Let the numbers be x and y. Then x + y = 15 and xy = 54. Testing option A: 6 + 9 = 15 ✓ and 6 × 9 = 54 ✓. The other options either fail the sum or product condition.
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