We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
535
3
avatar

Nigel has a stack of 4 and 5 pence stamps. What is the largest number of pence that he cannot make up by using these stamps?

 Jun 28, 2016
 #1
avatar+564 
0

https://en.wikipedia.org/wiki/Coin_problem

 

According to wikipedia: "With only 2 pence and 5 pence coins, one cannot make 3 pence, but one can make any higher integral amount."

 

So the answer is three..?

 Jun 29, 2016
 #2
avatar+7709 
0

3 pence. It's impossible to make 3 pence with 4 and 5 pence stamps.

 Jun 29, 2016
 #3
avatar
0

Actually, it's 11 pence.

11=4+4+3

 

numbers greater than 11 can be made with 4x+5y; x, y>0

 Aug 10, 2016

12 Online Users

avatar