Maths practice for 12-year-olds - page 271 of 359
Number of problems found: 7167
- Combined savings
Pavel has half as much savings as Standa but the same savings as Rado. Standa saved CZK 120 less than Rado. What savings do all three boys have together? A) less than CZK 600 B) CZK 600 C) CZK 960 D) 1200 CZK E) another number of crowns - Z7-I-4 stars 4949
Write instead of stars digits, so the next write of the product of the two numbers is valid: ∗ ∗ ∗ · ∗ ∗ ∗ ∗ ∗ ∗ ∗ 4 9 4 9 ∗ ∗ ∗ ∗ ∗ ∗ 4 ∗ ∗ - The rope
A 68-centimeter-long rope is used to make a rhombus on the ground. The distance between a pair of opposite side corners is 16 centimeters. What is the distance between the other two corners? - Diameter to area
Find the area of the circle whose diameter is 26 cm. - Cinema seats
There are 15 seats in the cinema. If we know the number of seats, we will say that there are more than 390 but less than 410. - Sphere surface
Calculate the surface of a sphere whose volume is 33.9 cm cubic. - Calculate - sphere
Calculate the surface and volume of the sphere if its radius r = 5 cm. - Sphere balls
Calculate the surface and volume of the sphere if the diameter d = 6.5 dm. - Triangle construction
I have to construct a triangle - procedure and solution side a = 7 cm angle β = 40 median to side c: tc = 5 cm - Greenhouse
In the garden the Šťastný family have a greenhouse, next to which there is a 200 litre barrel of water for watering. Per minute, 2.5 litres of water flow from the hose tap. In what time will the whole barrel be filled? For watering the greenhouse the fath - Coolant
The driver filled the car's coolant system with a mixture of 3.9 liters of water and 2.6 liters of antifreeze. In what ratio are these two components mixed? - Garden fencing
The rectangular flower garden fencing is 57.6 m long. If you know its dimensions are in a 5:7 ratio, find them. - The farmer
The farmer brought potatoes to the market. In the first hour, he sold two-fifths of the potatoes brought in. He sold five-sixths of the remaining potatoes in the second hour, and in the third hour, he sold the last 40 kg of potatoes. 1. Express a fraction - Strawberry picking
Ten temporary workers collect 50 kg of strawberries per day. How many kilograms of strawberries do seven temporary workers collect per day? - Satisfaction percentage
How many out of 40 women are satisfied? What is the percentage? - Dimensions of the frame
The picture frame is made of a 6 cm wide bar. The dimensions of the image are 74 and 57 cm. Are the inner and outer edges of the frame two similar rectangles? - Two sisters
Two sisters together have 54 CDs. 6/8 of the younger sister's CDs equal 3/5 of the older sister's CDs. How many CDs has each of the sisters? - Subject popularity
In the mini-survey of our class about the popularity of individual subjects, it was shown that 11.1% of pupils like mathematics, 18.5% like languages, 14.8% of pupils like physical education, and the remaining 12 pupils have several favorite subjects. How - Workers
Nine workers dig a 120-meter-long canal in eight hours. How long would it take five workers to dig a 200-meter-long canal? - Tank capacity
How many hectoliters of water can fit in a block-shaped tank with dimensions 24 m, 15 m, and 2 m deep? How many hectoliters of water must be drained so that the depth in the tank is only 15 dm? If the tank is full, how much water must be drained so that t
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