But pi is a celebrity numerical phenomena it is simple and basic enough to be a part of the standard sixth-grade math curriculum, and yet so mysteriously complex that all the supercomputers in the world will never find its last digit.

WSJ: We Can All Have a Slice of Pi | Postmodern Times by Eric Felten

As part of this change, derived entitlement to the basic state pension - where someone receives a married person's pension or a widow's or widower's pension based not on their own working life but the National Insurance record of their spouse or civil partner - will also go.

BBC: Finance