Maths practice for 12-year-olds - page 245 of 351
Number of problems found: 7017
- Express 6027
Express a drop of 8 percent per mille. - Investigation 6024
Kamil saved up to buy a new phone case, which cost CZK 390. He only put ten and twenty crowns in the cash box. After two months of investigation, he had 25 coins in his treasury. When he calculated the total value of all the coins, he found out that he st - Measured 6023
If a person has 6 kg of blood, how much alcohol does he have in his blood if they measured 3 per mille? - Equator 6020
The Equator. ..40075 km train. ..300m. How many trains would fit on the Equator? - Perimeter triangle
In the triangle ABC, there is a side c = 5cm and medians ta = 6cm (median to side a), tb = 4.5cm (median to side b). Find the perimeter of the triangle ABT (T = center of gravity). - 1-meter-wide 6001
A 1-meter-wide sidewalk will be paved around the block-shaped pool in the garden. The dimensions of the bottom of the pool are 8.5 meters and 6 meters. The height of the pool walls is 2 meters. There are 86.7 m³ of water in the pool. How high did the wate - Capacity 5999
The tank is filled in 1 hour and 12 minutes with a pump with a capacity of 25 l/s. How long does filling the tank with a 20 l / s pump take? - Dependence 5997
Sound travels in the air at a speed of 330 m/s. Build a table of the dependence of the distance the sound travels in a given time (for 1 to 10, one second at a time). Write the equation of the relevant dependence. - Received 5995
Jeníček, Karel, and Martin shared the money from the brigade in a ratio of 2:4:3. Karel received the most, namely 12.60 euros. How much did Jeníček and Martin get together? - Kilograms 5994
The courier brought four packages to the company that weighed 3.5 kg, 2 1/5 kg, 3/4 kg, and 250 g. How much did all the packages weigh together? Give the result in kilograms and write it as a decimal number. - In the Gargen
Workers will pave a 1-meter-wide sidewalk in the garden with tiles around the block-shaped pool. The dimensions of the bottom of the pool are 8.5 meters and 6 meters. The height of the pool walls is 2 meters. How many m² of pavement will be laid with tile - Bitoo and Reena
Bitoo ate 3/5 part of the apple, and the remaining part was eaten by his sister Reena. How many parts of an apple did Renna eat? Who had the larger share? By how much? - Tallest and shortest
Jenn is the tallest on the team. He is 1 1/2 times as tall as the shortest girl, who is 4 1/4 feet tall. How tall is Jebb? - Harvested 5984
A private farmer assumed a beet yield per hectare of x tons. He harvested an average of y tons more per hectare. How many tons of beets are harvested from 0.25 km²? - Rabbits 5980
Twenty rabbits have hay for 60 days. For how many days will five rabbits have them? - Corridor 5979
A mature man, whose step is 3/4 m long, crossed the corridor 46 steps. How many steps will a boy with 60 cm long steps take her? - Five pumps
The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with five same pumps? - Cylinder-shaped vase
If the cylinder-shaped vase is filled with water up to 35 cm, it contains 1 liter of water. How much water will it contain if it is filled to a height of 45cm? - Olda wanted
Oldrich wanted to enlarge the 9 cm x 13 cm photo so that the shorter side measured 18 cm. How big will the longer side of the photo be? - Volume of cone
Find the volume of a right circular cone-shaped building with a height of 9 m and a radius base of 7 m.
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