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Six cities are connected by train routes.

The train goes from Bristol back to Bristol.

It visits each of the other cities once.

How many different possible train routes are there?

Bristol

Birmingham

Newcastle

London

Exeter

Nottingham

£5

£7

£5

£6

£4

£3

£5

£4

£3

£4

London to Bristol

Birmingham to London

Birmingham to Nottingham

Nottingham to Exeter

Birmingham to Newcastle

Bristol to Birmingham

Exeter to Bristol

London to Exeter

Nottingham to London

Newcastle to Nottingham

This table shows the train fare for each direct route. Bristol to London is the same fare as London to Bristol and so on.

Which round trip from Bristol to Bristol is the cheapest/most expensive?

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