Maths practice for 12-year-olds - page 133 of 362
Number of problems found: 7223
- Rectangular 50093
The forestry plant plants new trees on a rectangular area 1.8 km long and 880 m wide. In the first week, they planted 3/11 of the total area. In the second week, they had 4/9 of the total area. How many hectares are left to plant? - There 11
There are 50 pupils in the class. Out of this number, 1/10 speak French only, and 4/5 of the ten speak French and English. If the rest speak English only, find the number of students who speak only English. - Shirts
In a classroom,1/6 of the students wear blue shirts, and 2/3 wear white shirts. There are 18 students in the school. How many students are wearing shirts other than blue shirts or white shirts? - Mr. Franklin
As shown, Mr. Franklin built a new set of stairs to his side door. What is the total volume of Mr. Franklin's unique set of stairs? - Chad buys
Chad buys peanuts in 2-pound bags. He repackages them into bags that hold 5/6 pounds of peanuts. How many 2-pound bags of peanuts should Chad buy to fill the 5/6-pound bags without having any peanuts left over? - Cheese consumption
I have some cheese. I used 2/5 of the total amount of cheese yesterday. Today, I used 2/5 of the remaining cheese from yesterday. If 900 g of cheese remains at the end of today, how many grams of cheese did I have initially? - A pizza 2
A pizza is cut into slices that are each 1/6 of the whole. John is going to eat 1/2 of the whole pizza. How many slices will John eat?
- Evaluate value
Evaluate the value of the following expressions: 1. The product of nine and the number 12 decreased by six 2. Eight decreased by three times a number 2. 3. The quotient of twice a number 49 and seven. - Jacob
Jacob is baking chocolate cookies. The recipe uses 2/8 of a cup of sugar to bake a batch of cookies. Suppose Jacob wants to make one-half of a batch. How many cups of sugar does he need? - A map 3
A map is drawn on a scale of 1:25000. This scale can be expressed as 1 cm representing n km. Find n. - Two cakes
Two cakes were each cut into eight slices. Maria ate 1/8 of the chocolate cake and one slice of carrot cake. Julia ate 1/2 of the carrot cake. Mark ate one slice of each. Thomas ate three slices of chocolate cake. How many slices were left? - Volume per time 2
Benjamin drinks tea at an incredible rate. He drinks 3 1/2 liters of tea every 2/3 of an hour. Ben drinks tea at a constant rate. How much does he drink in one hour? - Cuboid-shaped 49763
The cuboid-shaped sheet metal tank with dimensions a=25dm, b=5.6m, and c=180cm will be painted from the outside. How many cans of paint do we need to buy, and how many CZK crowns will we pay? One costs CZK 204, and it is enough to paint 8.5m². - Base side
In a quadrilateral prism, are known surface area S = 12400 mm2, base side m = 40mm, and prism height = 120mm. What is the length of base side n =? - Direction indicator
When a current of 1.6 A passes through the lamp direction indicator's 7400 mOhm resistance, which voltage is connected to it?
- Brian
Brian divides 80 by 7. Between what two whole numbers is his answer? - Pumpkin pie
I have some pumpkin pie. One-half of the pie is cut into four equal slices, and the other half is cut into three equal slices. After eating one of the larger slices (on the three-piece side), I wonder if I will eat more if I have one more from the three s - Fractions and mixed numerals
(a) Convert the following mixed numbers to improper fractions. i. 3 5/8 ii. 7 7/6 (b) Convert the following improper fraction to a mixed number. i. 13/4 ii. 78/5 (c) Simplify these fractions to their lowest terms. i. 36/42 ii. 27/45 (d) evaluate the follo - Diamond PQOR
In the diamond PQOR, the diagonal RQ is 4 cm long, and the angle RPQ is 60°. What is the circumference of this diamond? - Mike chose
Mike chose four identical cubes, three identical prisms, and two identical cylinders from the kit. The edge of the cube is 3 cm long. The prism has two dimensions, the same as the cube. Its third dimension is two times longer. The diameter of the base of
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