Draw 4 cards at random, add up the points, start with the added points, and count! What is the secret?

Look at this picture,

Odd numbers are arranged one after another in one direction.

Even numbers, too

therefore

When you touch an odd number of points, you will be punished in the opposite direction.

When the number of contact points is even, the positive direction will inevitably be fined.

You only have a 50-50 chance to choose the right direction.

Choosing the right direction, there is also a question of the probability of point occurrence.

For example, at 4 o'clock, there are only 1 possibilities,1+1,and only 50 yuan is paid. You can touch 1 1 1 more than 10 times.