Maths practice for 12-year-olds - page 140 of 353
Number of problems found: 7041
- Washing powder dosage
40 g of washing powder is needed for 10 l of water. When washing in hard water, the dosage should be increased by one-third. How many grams of detergent is required per 10 liters of hard water? - Fruit punch
Kelly made fruit punch to serve at a party for her chess team. She mixed 1 2/5 liters of cranberry juice and 1 3/5 liters of pineapple juice together. Then, she split the fruit punch evenly among nine glasses. How much fruit punch did Kelly pour into each - Athletic race
In a race, the second-place finisher crossed the finish line 1 1/3 minutes after the first-place finisher. The third-place finisher was 1 3/4 minutes behind the second-place finisher. The third-place finisher took 34 2/3 minutes. How long did the first-pl - Paper cutting
Susanna is cutting construction paper into rectangles for a project. She needs to cut one rectangle 10 inches × 14 1/2 inches. She needs to cut another rectangle 10 1/3 inches by 10 1/2 inches. How many total square inches of construction paper does Susan - Scrapbook
Jo is making a scrapbook for her best friend's 5th-grade graduation. She used 72 photos with six photos on each page. Jo had to remove two photos on each page to make room for the writing she wanted to include. Write an expression that represents the numb - Select
Select the statement that describes this expression: 5 x (3 + 4) - 4. a) 5 times the sum of 3 and 4, then subtract 4 b) 5 times 3 plus 4 minus 4 c) 5 more than the sum of 3 and 4, and then subtract 4 d) 5 times 3 plus the difference of 3 and 4 What is the - The temperature 11
The temperature on Sunday was 4 °C. On Monday it dropped by 8 °C, and on Tuesday it dropped by twice as much as on Monday. What was the temperature on Tuesday? - Recipe ingredients
Monica's cookie recipe calls for Three-fourths of a cup of flour. Her mother's recipe calls for Two-thirds as much as Monica's. How many cups of flour does her mother's recipe require? - Ball diameter density
What is the diameter of the ball (for men) if it weighs 7,250 g and ρ = 7.8 g / cm³ - Six identical
Six identical compressors inflate 180 balloons in one hour. How many balloons inflate one compressor in 10 minutes? - Water cylinder
Zuzana poured 785 ml of water into a measuring cylinder with a base radius of 5 cm. The water in the cylinder reached a height of 2 cm from the upper edge. How tall is the cylinder? (π = 3.14) - White and blue - Anna
Anna used 8.1 pints of white and blue paint to paint her bedroom walls. Four-fifths of this amount is white paint, and the rest is blue paint. How many pints of blue paint did she use? Express your answer in fraction and decimal form. Solve on paper. - Calculate v,V
A) Calculate the speed from the path calculation formula. B) From the formula for calculating the volume of the cone, express the radius r. - Function table graph
Calculate and write in the table 10 values of the function f: y = 3x + 1, and the function's graph from them. - Expression with brackets Evaluate the expression. 15+[(9-4)×22]
- Farmer 5
Farmer Joe ordered three bags of soil last month. Each bag weighed 4 ⅖ kilograms. He used the first bag in a week. At the end of this month, 2 ¾ kilograms of soil were left in the second bag and ⅞ kilograms of soil left in the third bag. How much soil was - Three rectangles
Some wire is used to make three rectangles: A, B, and C. Rectangle B's dimensions are 3/5 cm larger than Rectangle A's dimensions, and Rectangle C's dimensions are again 3/5 cm larger than Rectangle B's dimensions. Rectangle A is 2 cm by 3 1/5 cm. What is - Here are
There are white, blue, and red boats in a marina. Two-thirds of the boats are white, 4/7 of the remaining boats are blue, and the rest are red. If there are 15 red boats, how many boats are in the marina? Which tape diagram represents the number of white - Cuboid height volume
A cube has an edge of 30 cm. The cuboid has dimensions of the lower base, 45 cm, and 10 cm. What is the height of a cuboid if it has the same volume as a cube? - Water tank
The block-shaped tank is 2.5 m long, 100 cm wide, and 12 dm high. Water flows into the tank at 40 liters per minute. In how many minutes will it be filled with water to two-thirds?
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