Guitar For Sale

Boy with guitar

On Monday Devin bought a guitar for £8

On Tuesday he sold it for £15

On Wednesday he bought it back for £32

On Thursday he needed money for a football match so he again sold his guitar, this time for £39.

Overall, did Devin make or lose money?

A Mathematics Lesson Starter Of The Day


Topics: Starter | Money

  • J Duhig, Stevenage
  • I LOVE these starters, the book worm one is my recent favourite! I use them almost every day. Thanks!
  • Fahmin Begum Ali, Central Foundation Girls School
  • I love Transum. My teacher starts our maths lesson off with a starter everyday and its great. I would like to suggest that Transum gives more harder starters though. But overall Transum is GREAT!
  • Salif Fonso, WLA , Northolt, Middlesex
  • When he started without a guitar he had £7 in his pocket. At th end of it all(without the guitar once more) he had £14 in his pocket. That means he made £7 not £14 as the answer section states.
  • Mr McLaughlin And Primary 5, St Bernadette's Primary School, Motherwell
  • We found this quite challenging but worked out the answer in the end. It was good fun and it taught us about profit and loss. It was like being in The Apprentice!
  • Transum,
  • Thanks to everyone for their comments. It may be worth mentioning that each time this page is loaded a different set of figures is given for the guitar transactions. That means that you could use this starter more than once with the same class!
  • Miss Robbins, Green Hill Lower
  • This starter was really engaging... I found it was just the right length and the right amount of time it took to answer. In this time the children really enjoyed doing it. As our class isn't top, we did spend a little longer than other classes would have but it was still a great aspect to the lesson. I found that this was great homework to! I one of these starters for homework to take 10 minutes as everybody came in the next day saying it was a great homework and they would love to do it again, now we have a brain question every week ( one of your starters! ) I even found that with these there great fun for the kids to do as an extension in class. These starters also helped me find the people who were struggling and I did some different tasks for them to do (from Transum!) and they loved it. They still love maths! Your website makes people love maths of all ages!

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This starter has scored a mean of 3.3 out of 5 based on 369 votes.

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Globe of Flags

This activity is suitable for students of mathematics all around the world. Use the button below to change the currency symbol used to make it more relevant to your students. You may wish to choose an unfamiliar currency to extend your students' experience.

Globe of Flags


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Have you read Craig's book yet?

Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more...

"How I wish I'd taught Maths" is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL.

The Craig Barton Book

Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.

Here is the URL which will take them to a related student activity.

Student Activity


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