24 points

"24 points" is a kind of poker game, just like chess and chess are like entertainment activities.

It is gradually accepted by more and more people with its unique mathematical charm and rich connotations. This kind of game is easy to learn, able to brain and puzzle, and is an extremely useful activity.

Specific content and operation method

In the demotion deck, the remaining 52 kings are removed, and 4 cards are drawn at will, and the number on the board is counted as 24 using four operations. Each card can only be used once.

Game tips

1. Solve using 3x8=24, 4x6=24, 2x12=24.

Count the four numbers on the board as 3 and 8, 4 and 6, 2 and 12, and multiply by solving. Practice has proved that this method is the best method with the highest utilization rate and the highest hit rate.

2. Solve using the operating characteristics of 0, 1.

For example, 3, 4, 4, 8 can be formed as 3×8×(4÷4)=24. Another example is that 4, 7, 1 and 1 can be composed of 4×1(7-1)×1=24.

3. See if there are 2,3,4,6,8,Q in 4 cards

If so, consider using multiplication to make the remaining 3 numbers a corresponding number. If there are two identical 6,8,Q, for example, there are already two 6s, the rest can be counted as 24 if they can be made into 3,4,5, there are two 8s, and the rest can be made as 2 ,3,4, there are two Q, and the rest can be calculated as long as you can make 1,2,3, such as (9,J,Q,Q). If you don't have 2,3,4,6,8,Q, see if you can put the two numbers together first. In short, multiplication is very important, 24 is the integer with the largest common factor of 30 or less.

4. Add 24 points to plus or minus 4 cards.

5, first multiply, add, subtract a number.

6, there are scores in the calculation process. There are three regular rules. Let four numbers be a, b, c, d. There must be ab+c=24 or ab-c=24 d=a or b. If d=a has a(b+c/a)=24 or a(b-c/a)=24. Only 17 species can be used in this method.

7. A large number (more than 30) appears during the calculation. Relatively difficult, but sometimes only this solution. For example, (6, 9, 9, 10) is 9×10÷6+9.