Question

Sausages come in packets of 7. Bread rolls come in packets of 5. Dan wants to buy enough packs of sausages and rolls so that there are an equal number of sausages and rolls. What is the minimum number of sausages and rolls he needs to buy?

Answer 1

7 packs of rolls

5 packs of sausages

Explanation:

The easiest way to solve this question is to make a table with 3 columns

Rolls 5 10 15 20 25 30 35

Sausages 7 14 21 28 35 42 49

# packs 1 2 3 4 5 6 7

Looking at the table you can see that the first number that matches up is 35 so looking at that point we would need 7 packs of rolls and 5 packs of sausages.

Answer 2

5 packs of sausages7 packs of rolls

Explanation:

You need to find the common multiple.

5 x 7 = 35.

We know that before this there is no other common multiple becuase 7 does not multiply to a number that ends with a 0 or 5 until 35.

So, he will need to buy:

- 5 packs of sausages

- 7 packs of rolls