Given:
The set of all positive integers from 10 to 15.
To find:
The given set by using the descriptive method.
Solution:
The positive integers are 1, 2, 3, 4,... .
The positive integers from 10 to 15 are 10, 11, 12, 13, 14, 15.
So, the given set has 5 elements 10, 11, 12, 13, 14, 15.
Using the descriptive method, the given set is defined as "The set of all positive integers greater than or equal to 10 and less than or equal to 15".
Therefore, the set of all positive integers greater than or equal to 10 and less than or equal to 15.
List all the factors.
Factors of 15: 1, 3, 5, 15
Factors of 45: 1, 3, 5, 9, 15, 45
Factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
The common factors of 15, 45, and 90 are 1, 3, 5, and 15.
The answer is twenty four
12rocks 6 in each 2 equal piles
4 in each 3 equal piles And 3 in each 4 equal piles
