Summer Learning Journey - Activity 3 - Day 2 - Week 3

This year Panmure Bridge School is lucky enough to participate in the Summer Learning Journey from 2018-2019. This is an opportunity for the Manaiakalani cluster school to join. For the Summer Learning Journey we are given tasks to finish. The people who place 1st, 2nd, and 3rd from each school wins exclusive prizes. The prizes this year is amazing. I have completed most of the week 1 challenges and the week 2 challenges. I am apparently on week 3 now. The week 3 challenges is based called Up, Up and Away. This task was based on a special draining sink. For this task I was to solve out a maths problem. The maths problem was this. 

Let’s imagine that we tested the air in your classroom and found 7 different kinds of mould. Eek! The cleaner says that it takes 5 days for each mould to be eradicated (removed). If the school had to remove each mould one at a time, how long would it take to remove all the mould from the classroom?

My answer is 35, because I went 7 x 5 = 35. This answer came to my mind when I first saw it, because I knew that I should of times 7 and 5 together, which made 35.