Three guys go to the bar and get £30 worth of drinks. They pay £10 (10*3=30) each and the waitress takes the money. Before she puts it in the till the manager notices the guys and tells her “I know these guys, give them a £5 discount”
On the way to their table the waitress decides to give the guys £3 back and keep £2 as a tip.
The guys take a pound each, so instead of paying £10 each they end up paying £9 each (9*3=27).
And the question is: if they ended up paying £27 and the waitress kept £2 where did the last pound go?
In: 397
There’s a sleight of hand in the question.
The drinkers actually paid £27 and the waitress kept £2 of that as a tip.
Initial payment: £30
Actual money given back: £3
Actual payment: £30 – 3 = £27
‘Tip’: £2
Bar gets: £27 – 2 = £25
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