There are four boxes of fruit. It is known that there are 42 boxes of apples, pears and oranges on average, and 36 boxes of pears, oranges and peaches on average. Apples and peaches average 37 pounds per box. How many apples are there in the box? How many peaches are there in a box?
2.
In an examination, the average scores of Party A, Party B and Party C are 965,438+0, Party B, Party C and Party D are 89, and Party A and Party D are 95. What is the average score of Party A and Party D?
3.
The average of five numbers is 18. After changing a number to 6, the average of these five numbers is 16. What is the original number of this change?
4.
Arrange the five numbers from small to large, the average is 38, the average of the first three numbers is 27, the average of the last three numbers is 48, and what is the middle number?
5.
Find the average value of arithmetic progression 3,7, 1 1, 643.
6.
Xiao Ming went up the mountain at a speed of 3 kilometers per hour, and when he came back, he went back at a speed of 5 kilometers per hour. What is the average speed of Xiao Ming's round trip?
7.
There is a square lawn, and a one-meter wide path is built along the lawn. The road surface area is 80 square meters. Find the lawn area.
8.
There are six classes in grade five, and the number of people in each class is the same. Each class chooses 16 students to participate in the Young Pioneers activities, and the rest of the students are equivalent to the original four classes. How many students are there in each class?
9.
The sum of two digits of a two-digit number is 10. If the two digits of this two-digit number are reversed to form a new two-digit number, it will be 72 larger than the original number. Find the original two digits.
10.
A two-digit number, the number of ten digits is three times that of one digit. If these two numbers are reversed to form a new two-digit number, and the difference with the original number is 54, find the original number.
1 1.
A two-digit number, the number of the tenth digit is twice that of the first digit. If these two numbers are reversed to form a new two-digit number, the sum with the original number is 132, and the original number is found.
12.
Two digits, ten digits is 2 less than one digit. If these two numbers are reversed to form a new two-digit number, the sum with the original number is 154, and the original number is found.
3. The number of two digits is three times that of one digit. If you subtract 9 from this two-digit number, the number in one digit is equal to the number in one digit. This two-digit number is (
)。
14. Calculation1001× 7 ÷ 37× 444 ÷137 = (
)。
15. Calculate 22+42+62+...+402 = (
)
16. There are three digits, and the ten digits are the sum of one digit and a hundred digits. If you add 693 to this three-digit number, the hundred-digit number and the one-digit number will be exchanged. This three-digit number is (
)。
17. Six-digit 865abc
Divisible by 3, 4 and 5. In order to make 865abc as small as possible, A, B and C are (
)。
18. The product of the numbers 7 1427 and 19 divided by 7 is the remainder (
)。 The divisor of 504 is (
) one.
19. A certain unit of the People's Liberation Army conducted queue training, which just formed a phalanx. If each row is increased,
12
People, reduce
four
Rows can be arranged in a rectangle. * * * Yes (
) soldiers train in queues?
20. In the fifth-grade math competition, the product of Xiaoming's ranking multiplied by his age and competition results is 2 134, and Xiaoming's ranking (
), the result is (
) points.