Question

What is the greatest common factor of 40, 20, and 30?

Answer 1

Step-by-step explanation:

HCF OF 20 30 and 40 by listing common factors :-

factors of 20 -  1,2,4,5,10,20

factors of 30 - 1,2,3,5,6,10,15,30

factors of 40 - 1,2,4,5,8,10,20,40

There are 4 common factors

i.e, 1,2,5 and 10

therefore,

the greatest common factor of 40,20 and 30 is 10

Answer 2

Answer:

∴ Greatest common factor of $40,20$ and $30$ is $10$.

Step-by-step explanation:

• In context with question asked,
• We have to find the greatest common factor of $40,20$ and $30$.
• To find greatest common factor, we have to first find factors of given numbers.
• So, the factors are,

       Factors of $40=1,2,4,5,8,10,20,40$

       Factors of $20=1,2,4,5,10,20$

       Factors of $30=1,2,3,5,6,10,15,30$

• We can see that, the greatest common factor is $10$.
• ∴ Greatest common factor of $40,20$ and $30$ is $10$.