Who’s-Done-It Mystery Game

Learning mathematics is not fun for every student. At Blouberg International School, we believe in making mathematics fun and helping students love the learning journey. One way to do this is through interactive mathematics games, such as Who’s-Done-It Mystery – Death at the Jigsaw Shop.
Who’s-Done-It Mystery – Death at the Jigsaw Shop is an engaging mathematics mystery game to motivate Year 9 students to apply their mathematics skills independently to solve the mystery of a crime committed at the Jigsaw shop. The manager is dead, and the week’s takings have disappeared.
There are 32 suspects. There are 5 clues. Each clue gives a fact about the perpetrator and eliminates half of the suspects. The clues are jigsaws. To work out a clue, you must first make the jigsaw. Round the outer edge of the jigsaw are numbers. Each number represents a letter (a=1, b=2, c=3 etc.). The first letter of the clue is underlined and then the clue reads clockwise round the shape.
Students have the opportunity to apply a variety of mathematics skills to solve the mystery: fractions, percentages, directed numbers, and converting measurements.
This week, Year 9 mathematics students paired up, played the game, and managed to eliminate suspects and come up with the real perpetrator’s name.
Here are some of my students’ immediate reactions to this fun exercise:
- Detective Riley Hanning: “This is a serious case; someone’s life is involved here, and we ought to be precise and accurate!”
- Detective Ruby Lee Gallagher: “It’s fun and engaging. How I wish this was my everyday math lesson from Year 1.”
- Detective Oratile Tsotetsi: “This is obviously one of my favourite lessons. A double lesson went quickly without notice!”
Want to take up the challenge yourself?
See below files of evidence collected by the arresting police officer at the shop and try to come up with the perpetrator’s name. You can post your evidence and proofs to my email (given below).
Let’s enjoy mathematics as a family.
Mr Hebert Tapfuma
High School Mathematics Teacher
HOD Science & Mathematics
clue1clue2clue3clue4clue5storysuspects final list




