Youāve probably heard this viral riddle ā three friends go out to eat and somehow 1 BTC mysteriously vanishes. Letās break it down and solve the mystery once and for all.
š½ļø The Setup
Three friends go to a restaurant and receive a bill for 30 BTC. They each contribute 10 BTC, making a total of 30 BTC.
Soon, the waiter realizes the bill was actually only 25 BTC. To make up for it, he takes 5 BTC to return to them. But... 5 BTC canāt be split evenly three ways, right?
So, the waiter gives back 1 BTC to each friend (3 BTC total), and sneakily keeps 2 BTC as a tip. š¤«š°
š§® The Confusing Math
Now each friend has paid 10 BTC and received 1 BTC back. That means they really paid 9 BTC each.
So:
9 BTC Ć 3 = 27 BTC
The waiter kept 2 BTC, and when you add that:
27 BTC + 2 BTC = 29 BTC ā
But wait⦠they paid 30 BTC. Whereās the missing 1 BTC?! š²
š§ The Truth Behind the Illusion
Hereās the trick: the 2 BTC tip is already part of the 27 BTC. That total (27 BTC) includes:
25 BTC for the meal š²
2 BTC the waiter kept šø
So there's nothing to add.
The correct breakdown is:
30 BTC total = 25 BTC (meal) + 2 BTC (waiter) + 3 BTC (returned) ā
The whole thing is a clever play on logic ā a fun mind trick that mixes up how we group the numbers.
ā Lesson?