My brother-in-law showed me this quiz. What's your answer? (The English in the original version was
pretty bad; I have taken the liberty to correct the grammatical mistakes.)
Richard is selling slippers. His cost is $20 a pair,
selling at $30. There was a 20% discount during a certain festive period. One
customer came and bought a pair and paid him $50. Richard had no small change
so he changed it with his neighbour. The next day, the neighbour came back with
the $50 and told him that's counterfeit note. Richard paid the neighbour back $50.
How much did Richard actually lose?
For those who love such challenges, I urge you to read a
book by Noble laureate Daniel Kahneman: Thinking, Fast and Slow.
No comments:
Post a Comment