84 = 2 * 2 * 3 * 7
there is none it is a composite it is 1 and 84(it self )
336
336
84 is not a prime. All numbers ending in four are composite.
The LCM of 3, 4, and 7 is 84, which is the multiple of the highest power of prime factors from both numbers (2 x 2 x 3 x 7 = 84).
The least common multiple (LCM) of 4,7, and 12 is 84.There is no least common multiple for those numbers: the number seven is a prime number.
The answer is 4 because 4 you can break it into 2 times 2 and 2 is prime so thats the prime #s of 4 and for 84 you can do 42 times 2 then for 42 2 times 21 and then three times 7 = 21 so your prime factors of 84 are 237and 2 and the prime numbers of 4 is 2 and 2 so is you line those #s up there is 2 2's in common sooo... 2 times 2 = 4 so the gcf of 4 and 84 is 4. By : Olivia
1 x 76, 2 x 38, 4 x 19.
No they are not prime numbers because 4 is composite.
How about: 4*21 = 84
4 is not prime.
1. Write out their prime factorizations. 2. Determine which prime factors are shared by all 3 numbers. 3. Multiply them together. 4. That product is the gcf.For example, the gcf of 84, 126, and 686 is 14 because1. 84=2x2x3x7126=2x3x3x7686=2x7x7x72. All three numbers share 2 and 7 as common prime factors.3. 2x7=144. 14 is the gcf