Last week’s answer: Two sides are 4cm long and the other two are 5cm long. To work this out, you need to think of two numbers which add together to make 9 (half of 18) and multiply together to make 20. 4 and 5 are these numbers.
This week’s problem: Pedro builds a function machine. When the numbers 2 and 4 are put in, the machine gives 10. When 5 and 7 are put in, the machine gives 37. What will the machine give if 4 and 5 are put in?
The answer will be in next week’s weekly problem.