Maths practice for 12-year-olds - page 157 of 360
Number of problems found: 7199
- The fish
The fish vendor sells 1/7 kilos of bangus (milkfish) for 66.2 euro. If you will buy 9 2/8 kilos of bangus, how much will it cost? - Math homework
It took Jose two-thirds of an hour to complete his math homework on Monday, three-fourths of an hour on Tuesday, and two-fifths of an hour on Wednesday. How many hours did it take Jose to complete his homework altogether? - Wool ball
Mrs. Black used 1.2 kg of wool to knit the sweater. The shop sold a wool ball weighing 100 grams for 39 CZK. How much money would she save if she knitted the sweater herself than if she bought it for CZK 720 in the shop? (CZK is Czech currency = Kč) - Equation 36841
For which x the equation of the equation will apply: y = 1 / 2x-2, if y equals 5.2? - Width and length
A rectangle's length is three times more than twice its width. Suppose the perimeter of the rectangle is 60 feet. What is the length of the rectangle? - Jaroslav 36791
Oldřich ran out of the house at 7.00 at 10 km/h. After 3 minutes, Jaroslav also ran at 12 km/h. A) what time did Jaroslav Oldřich finish? B) how many km did each run? - Electric 36771
There was a gear in the electric mixer. The drive wheel had 24 teeth. The driven wheel had 36 teeth. When did the same teeth of both wheels meet again?
- Athletic oval
On the 400 m athletic oval, two athletes started back to back from the same level. After the starting shot, they both ran away from each other simultaneously. Athlete A ran at 15 km/h, and Athlete B ran at 17 km/h. A) in how many seconds did the athletes - Equation: 36731
Solve the equation: 1/3 * (8-z) = 1/2 * (1-8z) Please test the left and right sides. Thank you. - Calculate: 36721
In the trapezoid, it is given: all four sides a = 51 cm; b = 30 cm; c = 18 cm; d = 27 cm; and height v = 24 cm; Calculate: perimeter o=? and area S=? - Equation: 36711 Solve the equation: 5x- (6x + 9) = 10x + 2- (x + 5) Please test the left and right sides. Thank you.
- Trapezoid 36701
The field between the two parallel roads is shaped like a trapezoid with 180m and 100m long bases. The distance between the roads is 80m. When the yield of this type of cereal is 8.5 tons from 1 hectare, how many tons of barley were harvested in the field - Parameters: 36691
Calculate the length of the arms and the area of the isosceles trapezoid if you know the following parameters: o = 20 cm a = 10 cm, c = 4 cm h = 2 cm - Round skirt
The cut on the round skirt has the shape of an annulus. Determine how much m² of fabric will be consumed on an 80 cm long skirt. The waist circumference is a circle with a smaller radius of 69 cm. - Calculation 36671
A boy leaves school at a speed of 1 m/s. At the moment, when he is 100m away from the school, a classmate on a bicycle comes behind him at a speed of 5m/s. How long and how far does the boy run from school? Solve by calculation and graphically.
- The central
The central angle of a sector is 30°, and the radius is 15 m. Determine its perimeter. - Determine 36601
The plumbers have to cut sheet metal measuring 220 cm and 308 cm into squares of equal size so that the squares are as large as possible and the sheet metal is used without residue. How many such squares will they cut? Determine the side of this square. - Two hundred
Two hundred ten athletes competed in three athletics races on three fields. One hundred-five athletes competed in the first, 60 in the second, and everyone else in the third. On the individual courts, the athletes were divided into groups. Although compet - Granddaughter
In 2014, the sum of the ages of Meghan's aunt, her daughter, and her granddaughter was equal to 100 years. We know the age of each can be expressed as the power of two. In what year was the granddaughter born? - Equations 36561
Solve two equations with one unknown: a) 1/6 * x = 3 b) 4/7/y=2/7
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