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What number is it has 90 as a factor thre number is prime 21 is the multiple of the number?

If 21 is a multiple of the number, the number cannot have 90 as a factor.


What are the greatest common factor and least common multiple of 21 and 84?

The GCF of 21 and 84 is 21, since it is a factor of 84. The LCM of 21 and 84 is 84, since it is a multiple of 21.


Is 7 a multiple of 14 and 21?

No, 7 is a factor of them.


What number is a factor of 21 but not a multiple of 7?

The factors of 21 are 1, 3, 7, 21. The factors which are not a multiple of 7 are 1 and 3.


What number has 21 and 15 as a factor?

Any multiple of 105.


Is 7 a common multiple of 14 and 21?

No, it's a common factor.


What number is a factor of 70 is a prime number and 21 is a multiple?

7


Which number is a multiple of 7 and has 3 as a factor?

21 has 3 as a factor and is a multiple of 7, and so as 210, 105, and an infinite number of other numbers.


What are the lowest common multiple of 3 and 7?

Least Common Multiple:21 Greatest Common Factor:1


What is the greatest common multiple of 14 and 21?

The greatest common multiple of any set of integers is infinite.--------------------------------------------------------------------------------------------------------Did you perhaps mean:the greatest common FACTOR (the greatest number which divides into 14 and 21 without remainder): gcf(14, 21) = 7;the LOWEST common multiple (the smallest number which is a positive multiple of both 14 and 21): lcm(14, 21) = 42


What are the least common multiple and greatest common factor of 21 and 84?

Since 21 is a factor of 84, it is automatically the GCF. Since 84 is a multiple of 21, it is automatically the LCM.


The number 21 is the least common multiple of which two numbers?

3 and 7 or 1 and 21 or 3 and 21 or 7 and 21. 21 and any factor of 21.