Sets - practice for 11 year olds - page 2 of 3
Number of problems found: 49
- Students 8345
Ninety-seven pupils go to music school, each playing the piano or violin. Sixty-three pupils play the piano, and 58 pupils play the violin. How many students play the piano and the violin? - Ten boys
Ten boys chose to go to the supermarket. Six boys bought gum, and nine boys bought a lollipop. How many boys bought gum and a lollipop? - The average
The average of one set of 4 numbers is 35. The average of another set of numbers is 20. The average of the numbers in the two sets is 30. How many numbers are there in the other set? - Saleswoman 6465
The saleswoman took out 20 balls from the box, marked them with a price tag, and put them back in the box, then took out 12 balls and found that eight were drawn. How many balls were in the box, at least?
- Twenty-six 6320
There are 32 students in the class. Twenty-six of them are learning English, 15 are learning German, and four are learning only Russian. How many students are learning English and German? - Triangles
Ivo wants to draw all the triangles whose two sides of which have a length of 4 cm and 9 cm, and the length of the third side is expressed in whole centimeters. How many triangles does he have? - Reception 5951
At the embassy reception, everyone knows at least one foreign language: 15 people speak English 12 people speak German 7 both How many people does this society consist of if no one speaks another language? - Ten pupils
Ten pupils went to the store. Six pupils bought lollipops, and nine pupils bought chewing gum. How many pupils have bought both lollipops and chewing gums (if everyone bought something)? - Gloves
Petra has ten pairs of gloves in the closet. Six pairs are blue, and four pairs are yellow. How many pieces of gloves need to be pulled out, at least when she pulls them out in the dark and wants to have one complete one-color pair?
- Italian writer
There were 17 children in the barracks with an Italian writer. Six children ordered a book in an Italian original and 12 children in the translation. How many children ordered a book in both languages if the three children did not order it? - Rings - intersect
There are 15 pupils on the sporting ring. Ten pupils go to football, eight pupils go to floorball. How many pupils go to both rings at the same time? - Toy store
In the toy department of the store were exposed 28 dolls. Nineteen dolls were blondes or could speak. Twelve dolls were blondes, and 14 could speak. How many blondes could speak in the toy department? How many blondes could not speak? - PRESSCENTRUM 4364
In the morning, 65 buyers bought newspapers or magazines at the PRESSCENTRUM stand. The newspaper bought 53 buyers and the magazine 24 buyers. How many buyers bought both newspapers and magazines? - Rings groups
Twenty-seven pupils attend some groups. Fourteen pupils attend the Dance group, 21 sports group, and 16 in the dramatic group. Dance and sporting attend nine pupils, dance and drama six pupils, sporty and dramatic 11 pupils. How many pupils attend all thr
- -x-3/3 4027
x + 6/6 -x-3/3 = 3/4 - Identify 3954
Identify all subsets of sets: {3,5,8}, {1,4}, {0}, empty set. Write down the number of subsets. - Infinitely 3489
The solution to the equation 3x = 8x is a / no real number b / x = 8/3 c / x = 3/8 d / x = 0 e / infinitely many solutions - Chocolate 3462
There are 200 biscuits in the box. They used chocolate and sugar icing to make them. They used chocolate for 157 biscuits and sugar for 100 biscuits. How many biscuits did they use in both toppings? - Chamber
In the chamber, light is broken, and all from it must be taken at random. Socks have four different colors. If you want to be sure of pulling at least two white socks, we have to bring them out 28 from the chamber. To have such certainty for the pair of g
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