IXL | Divisibility rules: word problems

There are 35 questions on a quiz show. Each category has the same number of questions. How many categories could there be on the show?

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question

Wyatt has 48 trees to plant. He wants to put the same number of trees in each row with no extra trees. How many rows could Wyatt make?

key idea

A number is divisible by 5 if its ones digit is 0 or 5.

A number is divisible by 2 if its ones digit is 0, 2, 4, 6, or 8.

A number is divisible by 10 if its ones digit is 0.

solution

Which number evenly divides 48? Try each number.

First try the "divisible by 5" rule on 48.

Look at the ones digit:

The ones digit is 8.

The rule says that 48 is not divisible by 5.

Next try the "divisible by 2" rule on 48.

Look at the ones digit:

The ones digit is 8.

The rule says that 48 is divisible by 2.

Finally, try the "divisible by 10" rule on 48.

Look at the ones digit:

The ones digit is 8.

The rule says that 48 is not divisible by 10.

48 is divisible by 2. Wyatt could make 2 rows.

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Lesson: Divisibility rules

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