9514 1404 393
Answer:
- (4, 15), (2.5, 10), (15.5, 0.5)
- (1.5, 6), (2.5, 20)
Step-by-step explanation:
Where numbers are given the diagonal, figuring the missing factor or summand is trivial. (This works problems 2 and 3.)
When the product and sum are integers, find the factors of the product that have the given sum.
When they are not integers, you need to consider fractions of the usual divisors.
1: 60 = 1·60 = 2·30 = 3·20 = 4·15 = 5·12 = 6·10; sums are 61, 32, 23, 19, 17, 16
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4: 9 = 0.5·18 = 1·9 = 1.5·6 = 2·4.5 = 3·3; sums are 18.5, 10, 7.5, 6.5, 6
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5: 50 = 0.5·100 = 1·50 = 2·25 = 2.5·20 = 4·12.5 = 5·10; sums are 100.5, 51, 27, 22.5, 16.5, 15
