Maths practice for 12-year-olds - page 112 of 355
Number of problems found: 7081
- Calculate
Each of the 30 students speaks either English or German. Three of them speak both languages. Who speak only German are three more than those who speak only English. Calculate using a Venn diagram: Students speak English. Only A students speak English. N s - Children per woman
Calculate the average number of children per woman (arithmetic mean of the number of children) in a certain workgroup of women. The following numbers of children were found: 0, 1, 3, 2, 2, 1, 0, 3, 1, 1, 0, 1. - Cylinder S,V
What is the volume and surface area of a cylinder whose base has a diameter of 3.15 cm and a height of 25 cm? - The morning
The temperature rose 9 degrees from 10:00 AM to noon. By 3:00 PM, the temperature had doubled. From 3:00 PM to 6:00 PM, the temperature rose 4 degrees to 96 degrees. What was the temperature at 10:00 AM that morning? - Joseph tooth loss
Joseph has five teeth. He'll lose half a tooth in 3 days. How many teeth did he lose in 5.3 days? - Planting
The eighth graders took part in the planting of saplings in the forest for four days. On Monday, they planted a quarter of all the saplings they were supposed to plant. They planted a third of what they had left from Monday on Tuesday. On Wednesday, half - The sum 18
The sum of the three angles in a triangle is 180°. Find the 3rd angle of a triangle if the 1st and 2nd angles measure 58.3° and 45.5°. - The ratio 6
The ratio of cats to dogs is 2 to 5. If there are 35 total animals in the shelter, how many dogs are there? - Fruits 6
Ten mangoes, six guavas, and eight chicos are in a basket. What part of the total number of fruits are guavas? - The wire
A 5/6 meter wire is to be cut into pieces that are 1/12 meter long. How many pieces can be cut from the wire? - Janna
Janna takes her medicine three times a day. If 2 1/2 ml is taken each time, how many days will a 60 ml medicine last? - Some number
There is some number that if you subtract six from it first and then divide that total by three, you get 5. What is the number? - A sum 2
A sum of money is divided between Laura and Joan in the ratio of 2:3. Laura gets 8 pesos. How much did Joan get? - The enrolment
The enrolment for this school year is 2,340. If 1/6 are grade 8 and 1/4 are grade 10, how many are grade 7 or 9? - Christine
Christine sold four durians weighing 1.3 kg, 1.5 kg, 1.4 kg, and 1.6 kg, earning Php 353.80. How much is a kilogram of durian? - The carpenter 2
The carpenter has four pieces of wood that measure 0.4375m, 0.5624m, 0.755m, and 1.001m. How long is the wood if he puts them end to end? - The product 5
The product of two numbers is 250. One factor is 1/10 of 250. What is the second factor? What is the reciprocal of 1/10 of 250? - Goat's pen
Savannah built a rectangular pen for her goat that was 20 yards long and 15 2/5 yards wide. What is the area of this pen? - Three pieces
Mel has three pieces of lace measuring 4m, 0.2687 m, and 13.5 m, respectively. How long is the lace if she puts them end to end? - Map scale distance
The map has a scale of 1:2500000, and we measured a distance of 4 cm on the map. What is the distance in km?
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