divisibility rules

divisibility rules

Use the divisibility rules that we learned to determine the factors of each number and choose your answers carefully.

Multiple Choice

Choose all numbers that are divisible by 5.

• 672

• 1507

• 395

• 2,530,151

Let's review the rules: 45

• 5 is not an even number so it is NOT divisible by 2

• the sum of the digits (4+5=9) is 9 so it IS divisible by 3 and also by 9.

• the last two digits are NOT a multiple of 4

• it ends in a 5 so it IS divisible by 5, but NOT by 10

• it is NOT divisible by 2 and 3 so it is NOT divisible by 6

Multiple Select

Place a check beside the numbers that are divisible by 2.

• 68

• 954

• 1,050,374

• 61

Poll

What must we do to know if a number is divisible by 9?

• Add up the digits

• Look at the last two numbers

Poll

OPINION: Which rule is the most difficult for you to use?

• 2 - even numbers

• 3 - sum of the digits is 3,6, or 9

• 4 - are the last two digits a multiple of 4

• 5 - ends in a zero or five

• 6 - divisible by both 2 & 3

Multiple Choice

Using the divisibility rule for 6, which of these numbers will work?

• 825

• 932

• 100

• 315

Open Ended

Explain how to use the divisibility rule for 4 on the number 6,720.

Multiple Select

Select all the factors of the number 132.

• 2

• 3

• 4

• 5

• 6

Multiple Select

Select all the factors of the number 8,304.

• 2

• 3

• 4

• 5

• 6

Multiple Select

Select all the factors of the number 2050.

• 2

• 3

• 4

• 5

• 6

Multiple Select

Did you give your best effort in this lesson and use the divisibility rules that we have learned?

• YES

• NO