I'm off hiking and I need to buy a bus ticket to the mountains. The ticket costs £4.25 and I have the following coins in my pocket:
2 x £2, 4 x £1, 50p, 3 x 20p, 2 x 5p, 2p, 7 x 1p
Weight is everything when you're climbing big mountains so I want to make sure I'm carrying as little as possible when I set off. Luckily I had the foresight to check the Royal Mint's website and look up exactly how much each coin weighs.
£2 - 12.0 grams
£1 - 9.5 grams
50p - 8 grams
20p - 5 grams
10p - 6.5 grams
5p - 3.25 grams
2p - 7.12 grams
1p - 3.56 grams
It's around this time that I consider that moving to the US and using notes for much lower denominations would really benefit me! Perhaps for my next trip!
Buses in the UK are often expect exact change, what coins should I give the bus driver so that I'm left with the smallest possible weight to carry on my hike and how much will that be?
Edit: For whatever little its worth 100p = £1