What are the common factors of 15, 30 and 60
The common factors of 15, 30, and 60 are:
1, 3, 5, 15
How much is the product of 21/2 and 2/5 less than 4
The product of 21/2 and 2/5 is (21/2) x (2/5) = 42/10 = 21/5.
To find out how much this is less than 4, we can subtract 21/5 from 4:
4 - 21/5 = (20/5) - (21/5) = -1/5
Therefore, the product of 21/2 and 2/5 is 1/5 less than 4.
To find the common factors of 15, 30, and 60, we need to determine the numbers that divide all three of these numbers without leaving any remainder.
Step 1: Find the factors of each number
- Factors of 15: 1, 3, 5, 15
- Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
- Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Step 2: Identify the common factors
By comparing the factors of all three numbers, we can find the common factors:
- The common factors of 15, 30, and 60 are 1, 3, 5, and 15. These numbers divide evenly into all three numbers.
Therefore, the common factors of 15, 30, and 60 are 1, 3, 5, and 15.