Answer:
GCF or HCF of 40, 10, and 20 is 10
Explanation:
First, divide all the numbers by 2.
(40/2, 10/2, 20/2)
The answer would be 20, 5, and 10.
Check which number divides all the numbers completely except 1
(5)
Divide them
(20/5, 5/5, 10/5)
The answers would be 4, 1, 2
There is no number (except 1) that has these numbers in its table of multiplication.
On the left side, the numbers are 2 and 5, multiply them
The final answer is 10.