Maths practice for 12-year-olds - page 155 of 352

Number of problems found: 7029

Dice roll probability
What is the probability of a random event A that a) an even number, b) a number divisible by three, c) a number greater than six will fall on the dice roll.
Odd prime probability
What is the probability that an odd prime will fall on a dice roll?
Odd compound probability
In the entertainment lottery, they draw one number from 1 to 35. What is the probability that they will draw an odd compound number?
Boy selection probability
Six boys and nine girls played in the school group. What probability will they point to the boy when they are reproached?
Pyramid surface volume
A quadrilateral pyramid has a square base 4 cm long, the height of the pyramid 5 cm, and the height of the wall 5.4 cm. Find the surface and volume of a quadrilateral pyramid.
The pharmacy
A pharmacy technician receives a prescription for 125 mcg of medication. The pharmacy has 0.25 mg scored tablets on hand. The technician calculates that the patient should take two pills per dose. The drug label indicates that 0.25 mg is equivalent to 250
Apples investment
The merchant bought a certain amount of apples and paid one denarius for every seven apples. The next day he sold all the apples for one denarius for five pieces and earned 12 denarii. How many apples did he originally buy, and how many did he have to inv
Strawberry harvest
Thirty-six women earned € 2,640 in 5 days during the strawberry harvest. How much € 24 will women earn in 8 days under the same conditions?
Largest possible cone
It is necessary to make the largest possible cone from an iron rod in the shape of a prism with dimensions of 5.6 cm, 4.8 cm, and 7.2 cm. a) Calculate its volume. b) Calculate the waste.
The length 2
The length of a rectangle is 12y² – 15y + 8, and the width is 7y – 11. Find the area of the rectangle.
Rita has
Rita has 3/4 m of Ifugao cloth. She used 2/3 m for placement. What part of Ifugao cloth was left?
Leo hiked
Leo hiked 6/7 of a kilometer. Jericho hiked 2/3 kilometers. Who covered a longer distance? How much longer?
The boy
The boy scouts spent 10/12 hours doing their daily exercises. They only used 1/4 hour in hiking. How much time did they use for other body exercises?
Curtain
Mrs. Lazo bought a 9 1/8 m curtain cloth. She used 3 5/6 m to make a curtain for their bedroom. How many meters of cloth were not used?
Faye had
Faye had a piece of ribbon. After using 3/8 meters for her headband, she had 1/4 meter left. How many meters of ribbon did she have at first?
Mrs. Susan
Mrs. Susan bought 3/5 m of curtain cloth. She used 1/8 m to make a curtain for the living room window. How many meters of cloth were not used?
Earth travel distance
The Earth is moving at a speed of 29.8 km/s, and what track will the Earth travel in an hour?
Leftover
Amos's salary is $2400 a month. He spends $1000 on rent. What is the fraction of his rent left?
Brno-Tachov highway
The distance Brno-Tachov is 360 km. At 8:00 AM, a car travels from Brno on the highway at an average 90 km/h speed. An hour later, a vehicle leaves Tachov towards Brno, whose average speed is 110 km/h. Calculate how far apart they will be at 11:00 AM when
Determine
Determine the salary of a part-time worker if the employer deducted (taxes, etc.) 840 euros from him, which was 6/50 of his salary.

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