Maths practice for 12-year-olds - page 277 of 347

Number of problems found: 6923

Equation
Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
Number ratio
Change the numbers 48, 27, and 36 in a ratio of 5:3.
Exponent ratio
What is the ratio of 2⁸:2^-5 equal?
Expression value
Specify the value of the expression: (1024^0.1): 9
Cargo
The car with cargo weighs 7610 kg, which is 23% of its total weight and cargo. How heavy is the cargo?
Exponent equation
Which number is hidden behind x: 2 · x = 16^0.5
Two rulers
We have two rulers. The scale interval on the first ruler is spaced 1 cm, and on the second is 15 mm. Rulers are attached to match the initial divider commas. What next dividers commas coincide? Find at least three cases.
Stolen amounts
X + Y = 31835 X is the amount stolen by 1,2 and 3 Y is the amount stolen by 4 and 5 1. stole half of X, 2. half the rest and 3 more on top of that 3. stole 6801.5 4. He stole 1/9 of Y, which is 513 5. He stole the rest
Average speed
Michael left the house by car at a 98 km/h speed. He came into the goal place for 270 minutes. Determine the distance between the two places.
Hazelnut eating
Denis eats 12 hazelnuts in 1 day. How many more hazelnuts must he eat a day to eat 57 hazelnuts in 3 days if he ate the same amount of nuts every day?
Square root value
Determine the value of x if x^0.5 = 6
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.
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

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