See if you can answer they riddle.
We already know the answer. And You?

Animations - Artur Kasperek (14 age) i PaweÅ‚ Fortuna (13 age) Gimnazjum nr 1 w Zawierciu, Poland

In the False Land, all the inhabitants always lie. In the True Land, all the inhabitants always tell the truth. A stranger is trapped in a room that has two doors. One door leads to freedom, the other doesn't. The doors are guarded by a jailer from the False Land and by another from the True Land. To find the door to freedom, the stranger can only ask one question to one of the jailers, but he doesn't know which is from the False Land and which is from the True Land. What question did he ask?

A student asks his teacher: How old are your daughters?
The teacher answers: If you multiply their ages you get 36. If you add them, you get
your house number. You still need to know: the eldest plays the piano.
How old are the three daughters?"

Inside a hermetically sealed room there is a light bulb, and outside the room there are three switches. Only one of the three lights the bulb. While the door is closed, you can press the switches as often as you want. But when you open the door, you have to say which of the 3 switches lights the bulb.

A sweet seller receives three opaque boxes.
One box contains mint sweets, another, aniseed sweets, and another a mixture of mint and aniseed. The boxes have labels which say "Mint", "Aniseed" or "Mixture". But the sweet seller is told that all the boxes are wrongly labeled.

What is the minimum number of sweets the man will have to take out to verify the contents
of the boxes?