The only common factor of 3 and 5 is 1.
23
268
The factors of -60 that add up to 17 are 20 and -3. When you multiply 20 and -3, you get -60, and when you add them together, you get 17. Therefore, the pair of factors you are looking for is 20 and -3.
The Prime Factors of 15 are 3, 5
To construct the LCM of a series of numbers we must include any factors which are particular to each of them and one of any factors which are common to all of them. The prime factors of 8 are 2, 2, and 2 ... so the LCM will have at least three 2s = 2, 2, 2 The prime factors of 10 are 2 and 5 ... so now we need to add a 5 to that list = 2, 2, 2 and 5 The prime factors of 12 are 2, 2 and 4 ... so now we need to add a 3 to that list = 2, 2, 2, 3 and 5 The prime factors of 75 are 3, 5 and 5 ... so not we need to add another 5 to that list = 2, 2, 2, 3, 5 and 5 2 x 2 x 2 x 3 x 5 x 5 = 600
23
They are: 2+3 = 5
268
23
-103
15 + 15 + 5 + 5 + 3 + 1 = 44
-13
-7
The factors of 3 are 1 and 3 and the factors of 5 are 1 and 5
Add them up. The prime factors of 30 are 2, 3 and 5. You can handle the rest.
7
5 and -6 2 and -3 1 and -2