19, 38, 57, 76, 95.
Multiples of 19 include 19, 38 and 57. For them to be common, they need to be compared to another set of multiples.
19, 38, 57, 76, 95, 114, 133, 152, 171, 190, 209, 228, 247, 266, 285, 304, 323, 342, 361, 380.
1, 2, 3, 5, 6, 10, 15, 30 1, 2, 19, 38
A very fast and effective way to do this would be a factor tree. I can't draw it on here, as I have no tools, but here is a crude example: 114= 6 * 19 2 * 3 * 19 Here is an explanation in words: 114/6=19, hence 114= 6 * 19 If you have ever been taught how to prime factorize, you must know to reduce it to prime numbers. 19 is already a prime number, so you leave it alone. 6 is not, and the primefactorization of 6 is 2*3, hence the prime factorization of 114 is 2*3*19. It is simple if you know how to prime factorize.
114, 228, 342
Multiples of 7: 7, 14, 21, 28, 35,... Multiples of 19: 19, 38, 57, 76, 95,...
19, 38, 57, 76, 95.
19, 38, 57, 76, 95
19, 38, 57, 76, 95, 114.
-14
19, 38, 57, 76, 95, 114, 133, 152, 171, 190
19, 38, 57, 76, 95, 114, 133, 152, 171, 190 . . .
(12/-19) divied by (6/38) = (12/-19) x (38/6) = 456/-114 = -4
-19 + 6 - 25 = -38
12/38 in simplest form is 6/19. Meaning 12/38 is both divisible by 2.
19, 38, 57, 76, 95, 114, 133, 152, 171, 190.