Addition, Multiples
Key Stages: 2 and 3 ★★
This is an adding game for two players, in turn you choose 1, 2, 3 or 4 and add it to the total. The player who makes 23 wins. Can you find a winning strategy?
Got It is a motivating context in which learners can apply simple addition and subtraction. However, the real challenge here is to find a winning strategy that always works, and this involves working systematically, conjecturing, refining ideas, generalising, and using knowledge of factors and multiples.
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 Stages: 2 and 3 ★★
This is an adding game for two players, in turn you choose 1, 2, 3 or 4 and add it to the total. The player who makes 23 wins. Can you find a winning strategy?
Got It is a motivating context in which learners can apply simple addition and subtraction. However, the real challenge here is to find a winning strategy that always works, and this involves working systematically, conjecturing, refining ideas, generalising, and using knowledge of factors and multiples.
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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