Last week, I travelled from Birmingham to Glasgow (via bicycle).
On the first day I travelled one quarter of the distance.
On day two, I travelled one half of the remaining distance.
On day three, I travelled three quarters of the remaining distance.
Yesterday I travelled one third of the remaining distance.
I now have 21 miles left to travel.
How far is it from Birmingham to Glasgow in total?
[Ref: ZZVA] © Kevin Stone
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