Yesterday my mother asked me to buy some stamps. Stamps, in the land of BrainBashers, are available in 3p, 9p, 11p, 17p and 21p denominations.
For three types of stamp I was asked to buy eight of each. For the other two types of stamp, I was asked to buy nine of each.
Unfortunately I forgot which I was supposed to buy eight of and which to buy nine of.
Luckily my mother had given me the exact money required to buy the stamps, £5.00 and the shopkeeper was able to give me the correct stamps.
Which stamps did I buy?
[Ref: ZNRA] © Kevin Stone
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