Maths practice for 12-year-olds - page 291 of 347
Number of problems found: 6932
- Roll the dice
What is the probability that if we roll the dice, a number less than five falls? - Pool percentage
Nine hundred hectoliters of water were filled into the cylinder-shaped pool. The pool is 1.5 m deep, and its diameter is 10 m. What percentage of the pool volume has the water-filled? - Square root calculation
Determine an unknown number equal to two-fifths of the square root of 49. - Raspberry baskets
Find how many raspberries are in the third and tenth baskets, if there are three raspberries in the first and eight raspberries more in each. - Consecutive numbers
The sum of four consecutive odd numbers is 240. What are the numbers? - Sticker collection
Peter is a 5th-grade student. He collects stickers. He has two-thirds of them in the album, a quarter is ready for exchange, and he wants to give eight stickers to his friends. How many stickers does Peter have? - Fuel consumption
The car consumed m liters of gasoline per s of kilometers. How many liters of gasoline does it consume per 100 km? - Suit price
The webshop reduced the price of the suit by p percent. What was the new cost of the suit? - Hotel
The hotel has a p floor each floor has i rooms from which the third are single, and the others are double. Find the number of beds in the hotel. - Beet pulling
Grandpa was pulling beets. The balance of forces of the participants was as follows: Grandfather : grandmother : granddaughter : dog : cat : mouse = 8:5:3:2.5:2:0.2. How many grandfathers would it take to pull out the beets? How many mice would be needed? - Points
Gryffindor won 437 points. How many points were obtained by each of the faculties if they were split at a ratio of 5:7:3:4? - Rainfall
How many liters of water fell in a 32 m long and 8 m wide garden if 8 mm of rain fell? - Pupils at cinema
Alena bought movie tickets for two groups of pupils. The first group purchased seven tickets for 1st and five for 2nd place, and she paid 62Kč. The second group bought 11 tickets for 1st and four for 2nd place and paid 82Kč. How much was the ticket for 1s - Gold bar weight
How much does a gold bar measuring 5cm, 10cm and 3cm, and 1 cm³ gold weigh 19.3 g? - Unknown number An unknown number increased by 300% equals 62. Determine an unknown number.
- Conva
How many liters of water fit into the shape of a cylinder with a bottom diameter of 20 cm and a height of 45 cm? - Well excavation
The well will have a diameter of 2 m and a depth of 7 m. How many cubic meters of soil are needed to excavate a well? - Solve
Solve this direct relation by the triplet: 0.25h. .. . . .. .. . . .. .. .. 3 pcs 6.5h. .. . . .. .. . . .. .. . . .. .. x pcs - Smallest internal angle
Calculate what size has the smallest internal angle of the triangle if values of angles α:β:γ = 3:4:8 - Rectangular trapezium
Calculate the perimeter of a rectangular trapezium when its area is 576 cm² and side a (base) is 30 cm, height 24 cm.
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