Ever wondered why you always end up with one odd sock after you wash them? well, maybe science has the answer.

First off we let a = b.
a   =   b

Next We multiply both sides by a
a2   =   ab

Next We can add a² to both sides
2a2   =   a2 + ab

Next We can subtract 2ab from both sides
2a2 - 2ab   =   a2 - ab

We can simplify this with factorisation
2 (a2 - ab)   =   a2 - ab

Dividing both sides by (a² - ab)
2   =   1

Well, neither really. Like Truffles, mushrooms fall under the category of fungi. This is because truffles are subterranean mushrooms (Fungus Tuber Ascomycetes Mycota - or sac mushroom to you and me).
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After a good meal, the last thing you want to do is think hard, but beware, there could be foul play afoot.

Three friends go to dinner. At the end of the dinner the bill arrives and it is £30 (sterling) Each friend puts in a tenner and the waiter goes back to the till… looking at the bill the waiter realises he has made a mistake and it was only £25, as the till is low on change and there is only 3 of them, the waiter gives each man a pound back, and pockets the other £2.

Each man has paid £9, thats £27, plus the £2 the waiter took, thats £29..

What happened to the other £1