I got told a riddle type thing. It's impossible. I wanna see if the bright minds at TF2M can help me figure this one out. 3 People go into a second hand car dealership. They buy a car, that costs £300, therefor each one of them handing ovre £100. The salesman goes into the office to get the paperwork, when the manager says "We have reduced that car down to £250." The salesman puts £20 in his pocket, without the manager knowing. He then gives each of the people £10 pounds back, which makes up the rest. Each person has now paid £90 each. 3 x £90 = £270 The salesman has £20, add that on is £290. Where is the last £10 note?