+121 The product of two positive integers minus their sum is 39. The integers are relatively prime, and each is less than 20. What is the sum of the two integers?
+947
The product of two positive integers minus their sum is 39. The integers are relatively prime, and each is less than 20. What is the sum of the two integers?
11 x 5 = 55 This is their product.
11 + 5 = 16 This is their sum.
55 – 16 = 39
I can't give an explanation. I just tried a few until I hit it.
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