Maths practice for 12-year-olds - page 285 of 359

Number of problems found: 7167

Work time
Milos would do the work himself in 5 hours. How much would it take Dan to do the job together in two hours?
Weightlifter
Weightlifter lifted 75% of its weight. Determine how much weight is lifted when he weighs 132 kg.
Shots
Determine the percentage rate of keeper interventions if 32 shots don't catch four shots.
Evaluation
What is the result of the example (81¹/4): 4?
Pedestrian
Dana started at 10:00 from point A toward point B. The points are 12 km apart. Determine how fast Dana walked if she arrived at point B at 11:54. Express the speed in km/h.
Painting rooms
If Daniel paints for three hours daily, he completes it in 7.5 days. How many hours a day would he have to work to finish the job 1.5 days earlier?
Grass
Peter and Stanley mow the lawn together in 3 hours 12 minutes. How long would it take Peter alone if Stanley can mow the lawn by himself in 384 minutes?
Expression value
Find the value of the expression 9^x / 4y if x = 0.5 and y = 2.25.
Expression value
Specify the value of the expression: 1^-4:2^-3
Runner
Peter ran at a speed of 12.4 km/h. After 45 minutes of running, he had a hiatus. The track is 31 km long. How many kilometers is he still to run if he still runs at the same speed?
Price reduction
The goods became cheaper twice a row, first by 18% and then by 16% of the new amount. After this double reduction, it cost precisely 516 euros and 60 cents. Determine the flood amount of the goods.
Expression value
Express the value of y in the expression: y / 9^(- 1) = 72
Car distance
The car was traveling at a speed of 112.5 km/h. Determine what distance he would have walked in 144 minutes if he had kept going at the same pace.
Unknown number 17
Milada said, I am thinking of a number such that I evaluate expression x¹/3; the expression's value would be 5. Which number is Milada thinking?
Speed comparison
Damian drove 4 kilometers in 2.5 hours. Dasha drove 12 kilometers in 9.5 hours. Who went faster? 1) Damian 2) Dasha
Sprinter pace
The sprinter ran a distance of 500 meters in 61 seconds. How long would it take him to run a distance of 1,200 meters if he kept running at the same pace?
Exponent division
Determine the result: 3³:3⁴
Unknown number 4
I think number. When I divided its square root by its 1/9, I got a number 1. What number am I thinking?
Friends
James and Jerry are friends. Together they have 48 toy cars. If James takes eight cars from Jerry, Jerry would have 1.5 times as many toy cars as James. How many toy cars does each one have?
Four swords
Obelix has three helmets, four swords, and five shields. How many words must you make at the blacksmith forge Metallurgix to be able to walk another 90 days in unique armor?

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