Maths practice for 14 year olds - page 76 of 362
Number of problems found: 7237
- Mast rope anchoring
The mast is 190 m high and is attached to six ropes which are anchored in the ground at a distance of 20 m from the base of the mast. How many meters of rope were needed? - Tower deviation height
Determine by how many meters the deviated tower, whose height is 56 m, and the top of the tower is located at 55.855 m. - The average 8
The average point per game in NCAA men's basketball is 71 points. If Duke scored 112% of the average and UNC scored 0.87 times the average, who scored more points? - Parallelogram - sides
A parallelogram has a perimeter of 30 cm and heights of 10 cm and 6 cm. Find the lengths of its sides. - Number digit formation
How many numbers a) less than 500, b) greater than 500 can be formed from the digit 0,1,5,8,9 so that no digit is repeated? - Dance pair duration
Thirty-two boys and 34 girls came to the dance. How many different dance pairs can they make, given that each team is given: they can only dance for 1 minute and then take turns in 5 seconds? Calculate how long the dance evening would last for all the pai - Peter fruit choice
There are 12 apples and 10 pears in the basket. Peter has to choose either an apple or a pear from them so that Vera, who chooses 1 apple and 1 pear after him, has the greatest possible choice. Determine what Peter chooses. - Shoe cabinet combinations
In the shoe cabinet, there is one pair each of boots, sandals, tennis shoes, and brown and black ankle boots. Determine how many ways one right shoe and one left shoe can be chosen from among them that do not belong together. - T-shirts
The team bought white t-shirts for CZK 100/piece and black t-shirts for CZK 80/piece. A total of 50 pieces for 4200 CZK. How many black and white T-shirts did they buy? - Ski double discount
The supermarket reduced the original price of the skis by 20% in January. At the beginning of February, they reduced the new price by another 29%. By what percentage were the skis' costs lower than the original price in February? - A test 3
A test of five light bulbs showed that they burned for the following lengths of time (in days): 17 2/3, 19 1/4, 20 1/2, 21, and 18 3/4. For how many days, on average, did the light bulbs burn? - Aluminum resistance temperature
The aluminum coil line has a resistance of 4.6 Ohm at an elevated temperature of 64 °C. At what base temperature will the resistance be 2 ohms? - General triangle
Given a general triangle ABC. Its perimeter is 30 cm, with side a=2 cm longer than side b and 5 cm shorter than side c. Determine the area of the triangle. - Pavel Minecraft time
Peter played Minecraft for 2 hours yesterday. Paul played 10% longer. How many minutes did Paul play? - Student call percentage
The biology teacher, Carrot, randomly called the students to the blackboard. There were 25 pupils in the class, and Mr. Carrot called Ludek, Silva, and Mathias. What percentage of the total number of students was called today? - The angles 3
The angles in a triangle are in the ratio of 3:4:5. Work out the size of each angle. - Clock triangle angles
On the circular face of the clock, we connect the points corresponding to the numbers 2, 9, and 11, which creates a triangle. Calculate the sizes of all the interior angles of that triangle. - Dimensions - pool
The swimming pool dimensions are as follows: l:w:h = 10:4:1. The pool can hold 625 m³ of water. Calculate how many square meters of tiles need to be purchased for lining the pool walls if we add 5% for waste. - Blueberry collection ratio
Helen, Jane, and Michael collected blueberries in the ratio of 3:4:2. Helen collected 4.5 liters of blueberries. How many blueberries did Jane and Michael collect? - Kitchen cabinet assembly
Kitchen cabinets are sold in widths of 80 cm, 60 cm, and 40 cm. Which assembly can we choose if we have a wall 3.5 m long and we want to completely fill it with an assembly that also includes a dishwasher, the width of which is 60 cm, and the stove is 50
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