common factors of 20 and 143
The common factors of 20 and 143 are 1 and the number 11.
To find the common factors of 20 and 143, we need to determine the factors of each number separately and then identify the ones that both numbers have in common.
Let's start with the factors of 20. A factor of a number is a whole number that divides evenly into that number without leaving a remainder. For 20, the factors are 1, 2, 4, 5, 10, and 20.
Now, let's find the factors of 143. We can see if any numbers between 1 and 143 divide evenly into it. The factors of 143 are 1 and 143 since it is a prime number.
Comparing the factors of both 20 and 143, we can see that the only common factor they share is 1. Hence, the common factors of 20 and 143 are 1.
To find the common factors of 20 and 143, we will list all the factors of each number and see which ones they have in common.
The factors of 20 are: 1, 2, 4, 5, 10, and 20.
The factors of 143 are: 1, 11, 13, and 143.
From the lists above, we can see that the only common factor of 20 and 143 is 1.