IXL | Divisibility rules for numbers up to 100: word problems

Paul is arranging the photographs for his high school yearbook. He needs to put the same number of photographs in each row with no photographs left over. If Paul has 55 photographs to arrange, how many photographs could he put in each row?

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question

A dish company needs to ship an order of 15 glass bowls. The company will put the bowls into several boxes. Each box must contain the same number of bowls. How many boxes could the company use for the order?

key idea

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

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

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

solution

Which number evenly divides 15? Try each number.

First try the "divisible by 10" rule on 15.

Look at the ones digit:

The ones digit is 5.

The rule says that 15 is not divisible by 10.

Next try the "divisible by 2" rule on 15.

Look at the ones digit:

The ones digit is 5.

The rule says that 15 is not divisible by 2.

Finally, try the "divisible by 5" rule on 15.

Look at the ones digit:

The ones digit is 5.

The rule says that 15 is divisible by 5.

15 is divisible by 5. The company could use 5 boxes.

Looking for more? Try these:

Lesson: Divisibility rules

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Divisibility rules for numbers up to 100

Lesson: Divisibility rules

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