39
3,13
39 3,13
39 13,3 3 x 13 = 39
The greatest common factor of 39 and 18 is definitely 3.
Greatest common factor of 39 and 104 is 13.
The greatest common factor of 22 and 39 is 1
Here is a factor tree of 39: 39 3 x 13 Since these are prime numbers, the factor tree is finished. The prime factors of 39 are 3 and 13.
39 3,13
39 3,13
39 3,13
39 13,3 3 x 13 = 39
Factor tree: ............78 .........../..\ ..........2..39 ............../..\ ............3...13 78 = 2 x 3 x 13
195 5, 39 5, 3, 13
351 / \ 39 9 / \ / \ 13 3 3 3
3 * 13 (both prime numbers)
no
The factor tree is as follows: 114 57,2 19,3,2
Did this in maths at school last year :). If i remember correctly, you have to make a factor tree. 13 is a prime number and so cannot really have a factor tree. 39's factors are 3 and 13. So basically you have to multiply the numbers that appear in both factor trees. 13 x 13 is 169. Thinks that's the answer. If not, better get revising... "Believing is one thing, knowing is another"