Problem: The area the a rectangular garden is 24 square yards. List all feasible whole-number dimensions the garden can have.
You are watching: Common factors of 12 and 20
Solution: 1 yd x 24 yd, 2 yd x 12 yd, 3 yd x 8 yd, and also 4 yd x 6 yd
The whole-number size of this rectangular garden are the factors of the number 24. The following statements deserve to be made around the determinants of 24:
The factors of 24 are: 1, 2, 3, 4, 6, 8, 12 and also 24 because each of this numbers divides exactly into 24.The pairs the factors of 24 are: 1 and also 24, 2 and 12, 3 and also 8, and 4 and also 6.To uncover the factors of a whole number follow this procedure:
Keep separating until a variable repeats.List all determinants separated by commas.Example 1: discover the factors of 12.
| 1 | 12 ÷ 1 = 12 | 1 x 12 |
| 2 | 12 ÷ 2 = 6 | 2 x 6 |
| 3 | 12 ÷ 3 = 4 | 3 x 4 |
| 4 | 12 ÷ 4 = 3 | 4 x 3 |
Solution: The determinants of 12 are 1, 2, 3, 4, 6 and also 12.
(Note:
Example 2: find the components of 20.
| 1 | 20 ÷ 1 = 20 | 1 x 20 |
| 2 | 20 ÷ 2 = 10 | 2 x 10 |
| 3 | 20 ÷ 3 = 6 R2 | -------- |
| 4 | 20 ÷ 4 = 5 | 4 x 5 |
| 5 | 20 ÷ 5 = 4 | 5 x 4 |
Solution: The determinants of 20 space 1, 2, 4, 5, 10 and also 20.
Example 3: discover the determinants of 49.
| 1 | 49 ÷ 1 = 49 | 1 x 49 |
| 2 | 49 ÷ 2 = 24 R1 | -------- |
| 3 | 49 ÷ 3 = 16 R1 | -------- |
| 4 | 49 ÷ 4 = 12 R1 | -------- |
| 5 | 49 ÷ 5 = 9 R4 | -------- |
| 6 | 49 ÷ 6 = 8 R1 | -------- |
| 7 | 49 ÷ 7 = 7 | 7 x 7 |
Solution: The components of 49 space 1, 7 and also 49
Problem: discover the Greatest common Factor (GCF) of 12 and also 20. (Note: place your computer mouse over the lists of components below.)
The common factors of 12 and 20 are 1, 2 and 4.
The greatest common factor of 12 and also 20 is 4.
Solution: GCF = 4
To uncover the Greatest typical Factor (GCF) of 2 or an ext whole numbers, monitor this procedure:
Make a perform of components for each entirety number.Identify all determinants that are common to all lists.The Greatest typical Factor (GCF) is the biggest of these typical factors.In instances 4 through 6, place your computer mouse over the lists of determinants to view the usual factors.Example 4: find the GCF the 24 and 36.
The usual factors of 24 and also 36 are 1, 2, 3, 4, 6 and also 12.
The greatest common factor of 24 and 36 is 12.
Solution: GCF = 12
Example 5: uncover the GCF that 56 and also 63.
The typical factors the 56 and 63 are 1 and also 7.
The greatest common element of 56 and 63 is 7.
Solution: GCF = 7
Example 6: uncover the GCF that 12, 30 and 54.
The usual factors that 12, 30 and also 54 are 1, 2, 3 and 6.
The greatest common variable of 12, 30 and 54 is 6.
Solution: GCF = 6
Summary: The components of a whole number are those numbers that divide exactly into that whole number. The Greatest common Factor (GCF) that a collection of whole numbers is the biggest factor usual to all whole numbers in the set.
Exercises
Directions: read each concern below. Click once in response BOX and form in her answer; then click ENTER. After girlfriend click ENTER, a post will show up in the outcomes BOX to suggest whether her answer is correct or incorrect. To start over, click CLEAR.
| 1. | Find the GCF that 18 and 36.ANSWER BOX: GCF = RESULTS BOX: |
| 2. | Find the GCF that 30 and 48.ANSWER BOX: GCF = RESULTS BOX: |
| 3. | Find the GCF of 42 and 56.ANSWER BOX: GCF = RESULTS BOX: |
| 4. | Find the GCF that 16, 48 and also 72. See more: Labatt Blue Non Alcoholic Beer Calories, Calories And Nutrients In ANSWER BOX: GCF = RESULTS BOX: |
| 5. | One rectangle-shaped garden has an area the 18 square meters. One more rectangular garden has actually an area that 81 square meters. What is the largest feasible whole-number dimension common to both gardens?ANSWER BOX: GCF = m RESULTS BOX: |