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A, B, C and D are distinct positive integers such that the product AB = 60, the product CD = 60 and A - B = C + D. What is the value of A?

 Oct 25, 2020
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Use substitution to get the values for A, B, C, D:

 


A = 20 and B = 3 and C = 5 and D = 12
A = 20 and B = 3 and C = 12 and D = 5

 Oct 25, 2020
edited by Guest  Oct 25, 2020

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