Question

whats the highest common factor of 630 and 1560?

Answer 1

"To find the GCF of two numbers:
List the prime factors of each number.
Multiply those factors both numbers have in common. If there are no common prime factors, the GCF is 1." - Google.

Answer 2

first factorise them sepratelly

Answer 3

thn take the factor which are common in both

Answer 4

welcome to OS :)

Answer 5

u know how to factor ??

Answer 6

can you finish the prime factorisation of 1560 @Sarmster ?

Answer 7

I worked out most of it just not sure what to do now

3*3*7*5*2 = 630
3*5*2*2*3*3*3= 1560

3*3*2*7 = 126 (HCF)

Is this correct

Answer 8

@UnkleRhaukus

Answer 9

the first one is right ,

but 3*5*2*2*3*3*3 = 1620,
what steps did you have for factoring 1560?

Answer 10

you should get a factor of 13