2. Among the students in 100, 56 like music and 75 like sports. So, how many people love both music and sports? How many people are there at most?
3. There are 25 students in one class who participate in sports activities, 26 students in music activities, 24 students in art activities, 6 students in sports music activities 15 students in music beauty activities 14 students in sports beauty activities, and all three groups have 5 students. How many students are there in this class?
4. A school held a Chinese and math competition in the sixth grade, and the number of participants accounted for 40% of the total number of students in the whole grade. Two-fifths of the students took part in the Chinese contest and three-quarters of the students took part in the math contest, both of which were 12. How many students are there in the sixth grade in this school?
There are 52 students in a class, 48 of whom can play chess, 37 can draw and 39 can dance. How many people in this class are triathlons?
6. How many are the simplest true fractions * * * with denominator of 385? What is the total of these real scores?
7. A school 120 has 80 boys and 80 girls, and a language contest 120 has 80 girls. It is understood that there are 260 students in the school, of whom 75 boys participated in two competitions. So how many girls only took part in the math competition and didn't take part in the Chinese competition?
8. In the illustration of a math book, there are 100 parallelograms, 80 rectangles and 40 diamonds. How many squares are there in the illustrations of this book? How many at most?
9. In the fourth grade of Jingwei Primary School, 45 people participated in the activities to express their condolences to the PLA uncles who stayed at the Youth Palace, the Flood Control Memorial Tower and the Ninth Station. Visit the Youth Palace 19 people, visit the Flood Control Memorial Tower 18 people, and visit Jiuzhan 16 people. Seven people have been to Youth Palace and Flood Control Memorial Tower, six have been to Youth Palace and Jiuzhan, and five have been to Flood Control Memorial Tower and Jiuzhan. Three people have been to three places; The rest are preparing for condolences at school. How many people are preparing their condolences?
10. There are 32 students in Class One, Grade Five, 27 students in English Competition and 22 students in Chinese Competition, including Math English 12 students, English Language 14 students and Math Chinese 10 students. So how many students are there in Class One, Grade Five?
1 1. From 1 to 1998, how many natural numbers are divisible by 2 but not by 3 and 7?
12. In a factory, 80% people are on duty in the first quarter, 85% in the second quarter, 95% in the third quarter and 90% in the fourth quarter. Q: What is the largest proportion of full-time employees throughout the year? What is at least the percentage of the whole factory?
13. Grade five students in a school 1 10, participate in individual activity groups of Chinese, mathematics and English, and each student should participate in at least one group. 52 people are known to participate in the language group, and 16 people only participate in the language group; 6 1 person participated in the English group, and only 15 people participated in the English group; There are 63 people in the math group, and only 2 1 person in the math group. So how many people are there in the three groups?
1, 3*3*3. 14+4*4-38=4.26 cm2.
2. At least 56+75- 100=3 1 person, and at most 56 people.
3, 25+26+24-16-14-15+5 = 35 people.
4.40% * 2/5 * x+40% * 3/4 * x-40% x =12x = 200 people.
5, 48+37+39-52*2=20 people
6385 The simplest true score is 240, and the sum of true scores is 120.
Solution 385=5*7* 1 1, number of simplest truth scores =4*6* 10=240, minimum simplest truth score+maximum simplest truth score = 1, and so on, and the sum is/kloc-0.