Factors and Multiples Test Review

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12.

Front

What is a multiple?

Back

A multiple is the result of multiplying a number by an integer. For example, the multiples of 5 are 5, 10, 15, 20, etc.

Front

How can you determine if a number is divisible by 3?

Back

A number is divisible by 3 if the sum of its digits is divisible by 3. For example, for 816, 8 + 1 + 6 = 15, which is divisible by 3.

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 each of the numbers. For example, the LCM of 24 and 80 is 240.

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF of two or more numbers is the largest number that divides each of the numbers without leaving a remainder. For example, the GCF of 60 and 75 is 15.

Front

What is prime factorization?

Back

Front

Is 555,509 divisible by 3?

Back

No, 555,509 is not divisible by 3 because the sum of its digits (5 + 5 + 5 + 5 + 0 + 9 = 29) is not divisible by 3.

Front

What is the relationship between factors and multiples?

Back

Factors are numbers that divide another number evenly, while multiples are the results of multiplying a number by integers. Every factor of a number is also a multiple of that number.

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

What is the divisibility rule for 5?

Back

A number is divisible by 5 if it ends in 0 or 5. For example, 25 and 30 are divisible by 5.