Solve puzzle math, math puzzle solving

Solution: This problem can be solved using equations or arithmetic. I think most people use equations.

Here I will solve this problem using arithmetic methods. Answer with a hypothetical approach.

Let's assume that there are 30 more $5 bills 5=6 pieces, then there are as many $10 bills as there are $5 bills.

Then the total number increases from 48 to 48 + 6 = 54.

This is the case now, with 54 $10 and $5 notes, and a total of $10 and $5 bills.

Just as much. The face value ratio of a $10 banknote to a $5 bill is 10:5 = 2:1 Since a $10 banknote is as large as the total number of $5 bills, the ratio of the number of $10 bills to a $5 bill is 1:2

In this way, the number of 10 yuan banknotes is: 54 1 3 = 18 (pieces) Now the number of 5 yuan bills is: 54 2 3 = 36 (pieces) Then the number of original 5 yuan bills is:

36-6=30 (pieces) To sum up, the number of $10 bills is 18, and the number of $5 bills is 30.

10 yuan banknote: 54 1 3 = 18 (pieces).

Now 5 yuan banknotes: 54 2 3 = 36 (pieces).

Original $5 banknote: 36-6 = 30 (pieces).

48-30 = 18 (sheets).

10 18 = 180 (yuan).

5 30 = 150 (yuan).

180-150 = 30 (yuan).

Chickens and rabbits in the same cage.

The hypothetical method assumes that they all get off at the end of the train.

Total income: $50.

Now only the yuan is collected, and it is less:

Yuan gets off halfway, and each person is charged less: Yuan.

Number of people getting off the bus: people.

Solution: If there are x people who get off the bus halfway, then the people who get off at the end of the train have (50-x) people x=

x = 27 There were 27 people who got off the bus.

Assuming that all get off at the end of the train, then the yuan should be charged, the extra yuan is charged, and the more is because someone gets off the train halfway, and the difference between the ticket that gets off the train in the middle and the ticket that gets off at the end is yuan, and the number of people who get off the train in the middle is people.

Set up x people who get off at the middle and Y people who get off at the end of the train.

x+y=50

x=27 (person), y=23 (person).

Solution: Because everybody has to do it halfway. All of them get off the bus in the middle of the way, and they are overcharged, and these are the overcharged yuan for each of the end of the train, and you can calculate the number of people who get off the bus at the end of the line.

Then get off halfway 50-23=27 people.

Set up x people who get off the bus halfway:

x=27A: 27 people got off halfway.

A total of 50 people are set to have some people who get off at the middle of the train as x people, and some people who get off at the finish line as 50-x people.

You can list the meta.

Solve x is 27 people, and 27 people get off the bus halfway.

Solution: There are x people who get off the bus halfway.

x=x=27

There were 27 people who got off the bus halfway.

Each radius of the circle is equal, and the diameter can only be up to 4 cm and the radius is 2 cm

Volume = base area * height.

24*2=48 (cubic decimeter).