Today Puzzle #596
Puzzle No. 596– Thursday 24 October
China has the world's largest number of "unicorns," privately-held start-up firms valued at more than $1bn. The country has produced 206 unicorns while the US has 203. If together the two countries are home to 80% of the world's unicorns, how many are there in total?
Today’s #PuzzleForToday has been set by Dr Shaun Fitzgerald, Director of The Royal Institution
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409 unicorns = 80% of the total. Total number = 409/0.8 = 511 (to the nearest whole number).