The Half-way Decimal Game

Thanks for visiting NZMaths.
We are preparing to close this site by the end of August 2024. Maths content is still being migrated onto Tāhūrangi, and we will be progressively making enhancements to Tāhūrangi to improve the findability and presentation of content.

For more information visit https://tahurangi.education.govt.nz/updates-to-nzmaths

Chris, Fergus and Graeme play a game. Chris and Fergus each choose a decimal and Graeme tries to find the decimal that is half-way between Chris’ and Fergus’ decimals on the number line.

If Chris chooses 0.12 and Fergus chooses 0.012, what decimal should Graeme choose?

Solution