80/6 = 13.3
so say she buys 13 * 5 = 65
then she gets 65/5 = 13 free
which is 78
so she needs to buy 2 more
65 + 2 = 67
For every 5 highlighters that Agnes buys , she gets 1 free. If Agnes needs 80 highlighters, what is the least number of highlighters she has to buy?
2 answers
Gillian has three ropes measuring 54 cm, 108 cm and 189 cm. She cuts them into equal pieces. The length of each piece is the longest possible she can cut. What is the length of each piece of rope?