Maths practice for 12-year-olds - page 221 of 347
Number of problems found: 6930
- Find x
Solve: if 2(x-1)=14, then x= (solve an equation with one unknown) - Trapezoid Billboard Area Gain
The advertising agency invented a new shape for billboards to attract attention - a trapezoid. How much more m² of area did they gain if the size of the classic billboard is 5.1x2.4 m and the dimensions of the trapezoidal billboard are 4.2 and 6 m bases a - Unknown number
I think the number. I'll reduce it to its one-third. The result is then increased by one-third, and I get the number 12. - Perpendicular sides
In the ABCDEFGHIJKL, the two adjacent sides are perpendicular to each other, and all sides except the AL and GF sides are identical. The AL and GF sides are twice as long as the other sides. The lines BG and EL intersect at point M. The quadrilateral ABMJ - Clock hands intersection
Calculate exactly when the hour and minute hands on the clock intersect. - Donuts
Find how many donuts each student will receive if you share 126 donuts in a ratio of 1:5:8 - Employees
Of all 360 employees, there are 11/12 women. How many men work in a company? - Gold horseshoe
Calculate the volume of a gold horseshoe that weighs 750 g. - Family Trip Child Discount
A trip for one person costs CZK 14,800. If the child has a quarter-price discount, how much will a family of three pay for it? - Write 2
Write 791 thousandths as a fraction in expanded form. - Motorcyclist
From Trutnov, the motorcyclist started at an average speed of 60 km/hour. At 12.30hrs, Peter began driving the passenger car at 80 km/hour. How many hours and at what distance will a car catch a motorcycle from Trutnov? - The Mayflower
The Mayflower sailed for 66 days on its voyage from England to America. If 1/2 of the days at sea were sunny with good weather, 1/6 of the days were sunny but very windy, and the rest were stormy, how many days of stormy weather did the pilgrims experienc - Drawing Scale Ratio Board
I have a board measuring 3.2 m x 1.23 m, and I need to draw it in A3 format. It is 42 cm x 29.7 cm. How do I find out the ratio for drawing the board? I will also ask for the procedure. - Z7–I–5 MO 2018
At the Rose garden centre, one shop ordered a total of 120 roses in red and yellow, the second shop a total of 105 roses in red and white, and the third shop a total of 45 roses in yellow and white. The garden centre fulfilled the order, in such a way tha - Game 27
Susan wanted to play the game. In the beginning, the first says a number from 1 to 8. Then the second player adds a number from 1 to 5 and tells the sum. Again, Susan adds a number from 1-5 and says sum, etc. The winner must say the number 27. What first - Point construction
Given an isosceles right triangle ABS with base AB. On a circle centered at point S and passing through points A and B, point C lies such that triangle ABC is isosceles. Determine how many points C satisfy the given conditions and construct all such point - Pump Fill Tank Time
The pump delivers 0.75 hl of water per minute. How long does it take to fill the tank with a volume of 10m³? Write the result in hours and minutes. - Adult
An adult person should drink on average 2.5 litres of liquids per day and sleep 7 hours. He works 8 hours daily. The diet should consist of three nutrients: proteins, carbohydrates, and fats. Per 1 kg of body weight of an adult, these are 2 g of proteins, - On the bed We want to plant several rows of cauliflower seedlings and several rows of lettuce seedlings alternately on the bed. The cauliflower seedlings are planted 45 cm apart, the lettuce seedlings 25 cm apart. Planting seedlings of both types of plants starts fr
- Paper box
Calculate whether 11 dm² of paper is sufficient for gluing a box without a lid with bottom dimensions of 2 dm 15 cm and 12 cm high. Write result as: 0 = No, 1 = Yes
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