Recko.
A daily estimation puzzle
Three numbers. Sixty seconds. No calculator.
Estimate each one, add them up in your head, and find out what the three had in common.
Percentage of the London Underground that
actually runs underground??
Plus
Stations on the Circle line
??
Minus
Depth of the deepest station on the network
in metres??
Equals
Your total?
First game
Mon 21 Sep