Question

How do you make a factor tree for 39, somebody help me out!!

Answer 1

its a tree, that splits into factors .... what are 2 factors of 39?

Answer 2

1 and 13

Answer 3

no, 1*13 is not 39

Answer 4

no, 1 is a factor and 13 is a factor

Answer 5

1 x 39 is 39

13 x 3 is 39

Answer 6

when we factor a number, we split it into number that multiply together that will equal it

Answer 7

1 and 39 are factors but that doesnt really help us build the tree

3 and 13 are better

Answer 8

so when you have the factors, which ones go first?

say, if you have three factors which goes first?

Answer 9

a tree is built in binary steps



if 3 or 13 had factors that we could work with, then we would continue the tree

Answer 10

the idea is to work it into smaller more workable parts until all thats left is prime factors

Answer 11

say 50

factors into 2 and 25

25 factors into 5 and 5

Answer 12

so 3 is a prime and 13 is a prime does that mean that the factor tree would be complete?

Answer 13

sorry i meant *if not is

Answer 14

yep, when all thats left is primes .. theres nothing left to contribute to the tree

Answer 15

alright, thanks
the assignment says:

39
(blank) x (blank) so i would write 3 and 13 there??

Answer 16

thats the only workable factors to me

Answer 17

1 and 39 really doesnt change the situation and we are left where we started

Answer 18

lol true

Answer 19

thanks so much!!! it was correct!!!!!!!

Answer 20

good luck

Answer 21

;) same

Answer 22

@HannahA another thing is, that 1 actually isn't a prime (because primes have 2 divisors - 1 and themselves. 1 only has 1 divisor -> 1)

Answer 23

ahh, i knew some said 1 wasn't prime but i never knew why

Answer 24

thanks!

Answer 25

you could say 1 has two factors 0 and itself but 0 isn't a factor is it?

Answer 26

'1 and itself' isnt a good definition. the number 1 has issues with it that simply does not make it viable if we are to keep our definitions in math consistent.

after all 1*1 = 1

Answer 27

:D

Answer 28

one question tho, if you have 78 and it has 7 factors, if you choose any they will all end up to be the same answer correct?

Answer 29

this is regarding factor trees

Answer 30

http://mathworld.wolfram.com/PrimeNumber.html

"The number 1 is a special case which is considered neither prime nor composite ..."

just in case you wanted a more indepth look at it all :)

Answer 31

78 = a times b

pick any 2 integers that fit the bill