Question : A and B are positive integers. If A + B + AB = 65, then what is the difference between A and B (A, B < 15)?
Option 1: 3
Option 2: 4
Option 3: 5
Option 4: 6
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Correct Answer: 5
Solution : Given: A + B + AB = 65, where (A, B < 15) Try numbers from 1 to14 for A and B. A = 10 and B = 5 satisfy the given equation. Hence, (A – B) = (10 – 5) = 5 Hence, the correct answer is 5.
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