25 and 28 are both multiples of 1.
The prime factors of 25 are 5 and 5. The prime factors of 28 are 2, 2, and 7. The two numbers do not share any prime factors, so their greatest common divisor is 1.
There are no multiples of both 28 and 16 that fall between 55 and 101.
5 and 25
The factors of 25 are: 1, 5, 25 The factors of 27 are: 1, 3, 9, 27 The factors of 28 are: 1, 2, 4, 7, 14, 28 Multiples: 25, 50, 75, 100 and so on. 27, 54, 81, 108 and so on. 28, 56, 84, 112 and so on.
Common multiples of 15 and 25 are all multiples of 75. That is because 75 is the least common multiple of 15 and 25. So they are 75, 150, 225, etc. Just keep multiplying 75 by 4,5,6...etc.
Every multiple of 525 is a multiple of both 25 and 105.
28, 35, 42, 49, 56
Multiples of 28
The multiples of 7 between 25 and 60 are: 28, 35, 42, 49, 56.
Example: 5 and 7 List the multiples of 5. 5, 10, 15, 20, 25, 30, 35, 40... List the multiples of 7. 7, 14, 21, 28, 35, 42... The LCM is the first number that appears on both lists.
The multiples of 28 include 28, 56 and 84. For them to be common, they need to be compared to another set of multiples.
Multiples of 4 are 4,8,12,16,20,24,28,32... Multiples of 7 are 7,14,21,28,35,42,49,56... The smallest number that is a multiple of both numbers is 28
The multiples of 25 are 1, 5, and 25.