Common deception on long distance bus

Every year, there are always cases in which passengers are cheated by bus, among which the most common are as follows:

(1) Guessing "3" and "8": guessing "3" and "8" is to use a piece of adhesive tape to fold into a small square, write "3" on one side and "8" on the other, put it in a small wine glass, and then cover it with a piece of rubber, so that the onlookers can guess whether it is "3" or "8". On the surface, there seems to be no flaw in this deception. In fact, there is a small magnet inside the tape. If there are many people who bet "3", then the cheater will use a large magnet tied to his arm to turn the tape over at the end of the bet. If there are many people who bet "8", then the person with the magnet tied to his arm will not move.

(2) Guess pencils: generally, fraudsters use two pencils, one red and one blue, and then use a rope to tie one of them, and then wind the two pens together. They ask the onlookers which pen the rope will be tied to when the rope is opened. This kind of deception is relatively simple. If he holds the blue pencil first, holds two ends of the rope in his hand, and opens the rope, then the rope is still wrapped around the blue pencil; if he opens it with a marked end of the rope, then the sleeve moves to the red pencil.

(3) Guess Poker: swindlers usually use three cards to let onlookers guess which card is red and which card is black. This kind of deception, playing cards people's technique is faster, ordinary people can't see the change, and in his arm there are other playing cards, he will change the cards in the dazzling shuffle.