6 and 7
6 and 13
13
4 and 9 and the diff is 5.
This is mathematically impossible. The highest product that you can get with two numbers that make thirteen is 42 (7*6). The lowest sum you can get for two numbers with a product of 155 is 36 (31 and 5). All in all, it's impossible.
8 and 5
The numbers are four and nine.
The two numbers are 13 and 18
9 and 13
Take 13 and 17 as an example. Sum is 13 + 17 ie 30, product is 13 x 17 = 221
6 and 13
They are 9 and 13
35
55
13
The numbers are 13 and 8 The product is 104
six, seven 7 + 6 = 13 (sum) 7 - 6 = 1 (difference) 7 x 6 = 42 (product)
4 and 9 and the diff is 5.