Maths practice for 12-year-olds - page 215 of 351
Number of problems found: 7018
- Field circumference calculation
The rectangular field is 2a meters long and a-2 meters wide. Calculate the field circumference. - Hectoliters of water - Garden
Garden tank dimensions: length. ..4,6 meters, width. ..3,8 meters, depth. ..1.6 meters. How many hectoliters of water is in the tank when it is filled to 2/3? - Father Daughter Age Multiple
Dad is 43 years old, and his daughter is 17 years old. How many years ago was a father three times older than a daughter? - Dice box count
Stanley got a box of dice. Half of them were brown and blue, and the other half were red, yellow, and green. There were 12 more red than yellow dice, 19 more red than green, and 5 more green than yellow. How many cubes were in the box? - Reading book
If I read 15 pages daily, I will read the book in 20 days. How many pages do I have to read a day if I want to finish the book in 12 days? - Aquarium Water Level Area
There are 140 liters of water in a rectangular aquarium with 800 mm and 50 cm base dimensions. How high in cm does the water level reach? What is the area in dm² of the inner walls of this aquarium up to the water level? - Number multiplication puzzle
To get their sum, what number do you have to multiply the difference between 3 1/2 and 2 3/4? - Diamond - simple
Calculate the circumference and area of the diamond if the side is 5 cm long and the height is 3 cm long. - Kite paper purchase
The production of kites requires 12 square meters. The paper is 125 cm wide. How many meters of paper do we need to buy? - Reminder and quotient
Numbers A = 135 and B = 315 are given. Find the smallest natural number R greater than one so that the proportions R:A, R:B are with the remainder 1. - Car crash
After a traffic accident, police measured 1.16 permille of alcohol in the driver's blood. About 5 kg of blood circulates in the human body. What amount of alcohol did the driver have in the blood? - Circular arc length
The length of the circular arc at the corresponding angle of 120 ° is 8 cm. What is the size of the whole circle? What is its radius? - Caleb
Caleb is making lemonade for a party. He has 5 gallons of lemonade. He puts 1/3 cubic inch of lemonade in a cup for each guest. How many guests are going to be at the party? - Oven carrying weight
The inner radius of the oven is r1 = 15cm, the outer radius is r2 = 20cm, and the length is 227cm. Can one person take it if its material density is 2.8 g / cm cubic? - Inquality
Solve inequality: 3x + 6 > 14 - Milo lifted
Milo lifted 65 lb 6 times, and Jeremy lifted 50 lb 9 times. Which one lifted the most weight? - Container diameter calculation
What is the diameter of a cylindrical container if half a liter of water reaches a height of 12 cm? - Divide 5
Divide number 288 by the following ratio of 3:4:5. - Melting point
The melting point of mercury is -36°F, and its boiling point is 672°F. What is the difference between the boiling point and the melting point? - Find unknown Find an unknown numerator: 4/8 + _/8 = 1
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