Last week’s answer: 1200 blueberries. 2/5 of 4000 = 1600, so there are 1600 strawberries. 30% of 4000 = 1200, so there are 1200 raspberries. Therefore there are 4000 – 1600 – 1200 = 1200 blueberries.
This week’s problem: I am wrapping Christmas presents. I have 3m of ribbon, and I need 50cm for each present. How many presents will I be able to wrap?
The answer will be in next week’s weekly problem.