21 has 3 as a factor and is a multiple of 7, and so as 210, 105, and an infinite number of other numbers.
Any multiple of 105.
Anything three-digit would have to be a multiple, like 280.
If 245 is a factor, and it is between 200 and 300, then the number must be 245 - provided it is a multiple of 7, which it is.
1 is the least common factor of the number 2, number 4 and number 7. 28 is the least common multiple of the number 2, number 4 and 7.
all perfect cubes (any number powered by 3) by adding or subtracting 1 become factor of 7 except base number as 7 and its factors.
The factors of 21 are 1, 3, 7, 21. The factors which are not a multiple of 7 are 1 and 3.
The only number that could be both a factor and a multiple is 7 itself.
3 is a factor of 21 and it is not a multiple of 7.
Any multiple of 105.
d. 3
No - nor is it a factor of 7.
7
Well, honey, a factor of 14 that isn't a multiple of 7 is 2. You see, a factor of a number divides into it evenly, while a multiple is the result of multiplying a number by an integer. So, in this case, 2 fits the bill perfectly. Hope that clears things up for ya, sugar!
1 and 3
Anything three-digit would have to be a multiple, like 280.
1, 2, 7
35 is a multiple of 7 7 and 1 are a factor pair of 7. 3 and 5 are a factor pair of 15