Stamps 3

The Ministry is migrating nzmaths content to Tāhurangi.           
Relevant and up-to-date teaching resources are being moved to Tāhūrangi (tahurangi.education.govt.nz). 
When all identified resources have been successfully moved, this website will close. We expect this to be in June 2024. 
e-ako maths, e-ako Pāngarau, and e-ako PLD 360 will continue to be available. 

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

The Post Office down the road has run out of all stamps except 3c and nc stamps, where n is any whole number. They have a large amount of each of these. The post master isn’t too worried though. He tells the person on the counter that he can make up every amount from (2n – 2)c onwards. Is that right? Can you justify it or can you find an amount of postage bigger than (2n – 2)c that the Post Office can’t make up?

Solution