18 = 2*3*3
21 = 3*7
Factorization: 2*3*7*19
The prime factorization of 378 is 2 x 3 x 3 x 3 x 7 = 378
378/\14 27/\ /\7 2 9 3/\3 3So the prime factorization of 378 is 2 x 3 cubed (or 3 to the third power) x 7.
It lowered it to 18 from 21.
In 1971 it lowered the age from 21 to 18. Since that time adulthood starts at 18.
18 = 21 x 32
18 = 21 x 32
The prime factorization for 21 is: 3x73 x 7 = 21
18 = 21 x 32
18 = 21 x 32
3 x 7 = 21, since both factors are prime, that is the prime factorization of 21.
The prime factorization of 18 is: 2 × 3 × 3
18 = 2 x 3 x 5 x 19 21 = 3 x 7
The prime factorization of 21 is 3 x 7.
Do you mean, "What is the prime factorization of 21?"
The prime factorization for 21 is 3x7.
The GCF of 18 and 21 is 3.The prime factorization of 18 is 2*3*3The prime factorization of 21 is 3*7So the GCF of 18 and 21 is 3.You can also notice that the difference between 21 and 18 is 3. The GCF can be no larger than the difference between the numbers. Since 3 is a factor of both 18 and 21, it is the GCF.The GCF is 3.3