Algebra - Creating and manipulating
Key Stage: 3 ★
Special numbers are two-digit numbers where adding the sum and product off the digits give the same number. What special numbers can you find? Can you use algebra to find them all?
This problem provides a great opportunity to introduce a very useful way of representing numbers algebraically. It also provides an opportunity to manipulate these expressions and relate the result to their numerical investigations.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
Key Stage: 3 ★
Special numbers are two-digit numbers where adding the sum and product off the digits give the same number. What special numbers can you find? Can you use algebra to find them all?
This problem provides a great opportunity to introduce a very useful way of representing numbers algebraically. It also provides an opportunity to manipulate these expressions and relate the result to their numerical investigations.
This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.
The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
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