8: 2
12: 2, 3
27: 3
90: 2, 3, 5
Prime factor each number. Collect the factors that are common. Multiply the numbers together and get it. 90=2x5x3x3 27=3x3x3 3x3=9
The prime factors are: 2,3,5.
19 and 90 have no common prime factors.
The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90. The common factors are 1, 2, 3, and 6, so the greatest common factor is 6. You can also determine this from the prime factors. The prime factors of 12 are 2, 2, and 3. The prime factors of 90 are 2, 3, 3, and 5. The prime factors they have in common are 2 and 3, so the greatest common factor is 2 x 3 = 6.
The factors of 27 are: 1, 3, 9, and 27.The only prime factor of 27 is: 3.The factors of 45 are: 1, 3, 5, 9, 15, and 45.The prime factors of 45 are: 3 and 5.
The prime factors of 90 are: 2,3,5
As a product of its prime factors: 2*3*3*5 = 90
90 has three prime factors: 2, 3 and 5.
The factors of 540 are: 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 90 108 135 180 270 540. The prime factors are: 2, 3 and 5
The prime factors of 18 are 2, 3, and 3. The prime factors of 90 are 2, 3, 3, and 5. The prime factors they have in common are 2, 3, and 3. Since 18 is a factor of 90, its prime factors will be the prime factors that the two numbers have in common.
The prime factor of 19 is 19. The prime factors of 90 are 2, 3 and 5.
The prime factors of 90 are: 2,3,5