Intro to Math M1 L4

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder. For example, 3 is a factor of 12 because 12 ÷ 3 = 4.

Front

What is a multiple?

Back

A multiple is the product of a number and an integer. For example, the multiples of 4 are 4, 8, 12, 16, etc.

Front

What is the Least Common Multiple (LCM)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all the numbers. For example, the LCM of 4 and 5 is 20.

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder. For example, the GCF of 8 and 12 is 4.

Front

How do you find the LCM of two numbers?

Back

To find the LCM, list the multiples of each number and find the smallest common multiple. Alternatively, use the formula: LCM(a, b) = (a * b) / GCF(a, b).

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest common factor. Alternatively, use the prime factorization method.

Front

Which of the following is a factor of 18: 4, 5, or 9?

Back

9 is a factor of 18.

Front

Which numbers have a common multiple of 10: 2, 5, 10; 5, 10, 20; or 2, 5, 7?

Back

2, 5, 10 have a common multiple of 10.

Front

What is the LCM of 5 and 15?

Back

The LCM of 5 and 15 is 15.

Front

What is the GCF of 12 and 18?

Back

The GCF of 12 and 18 is 6.