Adding Challenge
This QuickQuestion Interface © is a little bit different to many of the others. It creates a random question where you have to find all the possible ways to make a certain number by adding together the digits 1-9. It is based on an idea from 7puzzleblog.com, which is well worth a visit too.
Ideas for Teachers
This activity is an excellent puzzle that can be used as a starter to any lesson. In order to find all the possible ways of producing the target number, students will have to work systematically, and I find the best way is to start with 9, and see what you need to add to it. The "HINT" button reveals how many different ways there are to actually do it, and the "Show Ways" button will reveal all the ways to do it, in a sensible order for working systematically. You can choose between having to add 3, 4 or 5 numbers, as well as the range within which you would like the target number to fall. You can also use the "use own values" option to type in your own target number (one you may have prepared beforehand).
This activity is an excellent puzzle that can be used as a starter to any lesson. In order to find all the possible ways of producing the target number, students will have to work systematically, and I find the best way is to start with 9, and see what you need to add to it. The "HINT" button reveals how many different ways there are to actually do it, and the "Show Ways" button will reveal all the ways to do it, in a sensible order for working systematically. You can choose between having to add 3, 4 or 5 numbers, as well as the range within which you would like the target number to fall. You can also use the "use own values" option to type in your own target number (one you may have prepared beforehand).
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