Math puzzle: At least two of the 50 students have the same birthday.
At least two of the 50 students are from the same Amanome.
The math teacher and the head teacher bet that at least two of the 50 students in the class had the same birthday, and the loser invited the other to have a big meal. The class teacher is confident and ready to kill each other. After all, he wins most of the time 365 days a year. Is the fact really what he thinks?
Which side has a higher winning percentage?
First, the class teacher
Math teacher
C, the winning percentage is the same
Answer: The winning rate of math teachers is about 97%.
Math puzzle: How to divide 24 sweets?
Segmentation method of 24 candies
24 pieces of sugar, three piles.
The first pile is 1 1 capsule.
The second pile is 7 capsules.
The third pile is 6 capsules.
Move each pile of candy, and finally each pile is 8 pieces. It is required to move only three times, and the number added to a heap each time should be equal to the original number of this heap.
Answer: The first pile moves to the second pile, and there are 4 left in the first pile, and the second pile 14, then the second pile moves to the third pile, the second pile 8, the third pile 12, and finally the third pile moves to the first pile, all of which are 8.
Math puzzle: the way for a family to cross the river safely
Ways for a family to cross the river safely
There is a family, 1 father, 1 mother, 2 sons, 2 daughters, 1 servant, 1 dog. When the father is absent, the mother beats her son, the mother is absent, the father beats his daughter, the servant is absent, and the dog bites. Only father, mother and servant can sail, and only two people can sail 1 time. How can I cross the river safely?
Answer:
1: servant+dog crosses the river, and servant comes back.
2: Servant+son crosses the river, and servant+dog comes back.
3: Dad+son cross the river and dad comes back.
4: Dad+Mom crossed the river and mom came back.
5: servant+dog cross the river, and dad comes back.
6: Dad+Mom cross the river and mom comes back.
7: Mother+daughter cross the river, and servants and dogs come back.
8: The servant+daughter crosses the river and the servant comes back.
9: servant+dog crossing the river.
Math puzzle: let the equation be established by addition, subtraction, multiplication and division.
The equation is established by addition, subtraction, multiplication and division.
8 8 8 8 8 8 8 8= 1000
8 8 8 8 8 8 8 8=2000
Answer: ((8+8)+(8+8)-8)+8+8+8 = 2000. (8×8×8-8)×((8+8)÷8))-8= 1000。
Math puzzles: calculating probability
Calculation probability
One plane can carry 1000 passengers. After the first passenger got on the plane, he casually found a seat because he was stupid, obscene and immoral. If the person behind finds someone in his position, just find a seat and sit down.
Excuse me: What are the chances of the last person sitting in his seat?
Answer: 999 one, one seat is occupied. Let's assume that this person and position do not exist, and the remaining 999 seats can be taken at will, so every position may be left, so it is one of the 999 seats.
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