First you find what ever two number you can think of that multiply to 20 my first two numbers i think of is 5 and 4
20
5, 4 ===> now only 5 and 1 multiply to give 5 so two number that multiply to 4?
2,2
so now we cant go any farther we have 5, 2,2,
which we can also call our LCM
if you multiply 5*2*2 = 20 and you are done! hope this helps!
*** you could start with any two numbers that multiply to 20 as well****
10, 2
5,2
still get 5,2,2
20 10,2 5,2,2
20 4.5 2.2 answer:2.2.5
Factor Tree of 20: ........20 ......../ \ .......4 5 ....../ \ .....2 2
20 10,2 5,2,2
20 - 10 and 2 (2 is prime) from 10 do 5 and 2 (both prime)
20 10,2 5,2,2
20 10,2 5,2,2
10,2
23 is prime... you can't make a factor tree unless u r adding, then it would be 20+3 or almost anything else that = 23
20 10,2 5,2,2
20 10,2 5,2,2
10,2 5,2,2