Maths practice for 14 year olds - page 85 of 375
Number of problems found: 7497
- Coffee 6
Coffee worth $1.05 per pound is mixed with coffee worth 85 cents per pound to obtain 20 pounds of a mixture worth 90 cents per pound. How many pounds of each type is used? - Car parking ways
How many ways can ten cars park side by side in a parking lot? - Triangle perimeter ratio
The perimeter of the ABC triangle is 19.6 cm. The following applies to the lengths of its sides: a: c = 1:2, b: c = 5:6. Calculate the lengths of all sides of the triangle ABC. - Apple box picking
Karel, Peter, and Milan helped pick apples. It took Karl 30 minutes, Peter 45 minutes, and Milan 36 minutes to turn over one full box of apples. Calculate how long it would take them to acquire 3 full crates together. Mark one answer: a. 32 minutes b. 36 - Park work groups
Two working groups are adjusting the park. The first group will do the work in 15 days and the second in 25 days. How many days will they work together? - An Elizabethan collar
An Elizabethan collar is used to prevent an animal from irritating a wound. The angle between the opening (diameter 6 inches) with a 16-inch diameter and the side of the collar is 53 degrees. Find the surface area of the collar shown. - Table tablecloth material
The table top is 1.2 m long, 55 cm wide, and 35 mm thick. Calculate how many regular meters of a 1 m wide roll are needed for a tablecloth that extends 15 cm beyond the bottom edge of the table on all sides. - Circular grass seed
How many kg of grass seed must be bought to start a lawn in the shape of a circular section with a radius of r= 15 m and a central angle of 45 degrees if 1 g of grass seed is used per 1 dm of the square area? - Fountain grass seed
How many kg of grass seed should be bought to establish a lawn around a circular fountain with a diameter of 5 m if the lawn is to be 1.5 m wide and 1 g of grass seed is used per 1 dm of the square area? - Swimming pool 6
We open the first pipe and, after two hours, open the second pipe without closing the first. The swimming pool will be filled with both pipes in four hours. If we open the first pipe itself, it will fill the pool 1.5 times faster than the second pipe. How - A hiker
A hiker plans to hike up one side of a mountain and down the other side of points a mountain, each side of the mountain formed by a straight line. The angle of elevation at the starting point is 42.4 degrees, and the angle of elevation at the end is 48.3 - Group placement ways
I have eight groups. How could they place first, second, and third? - Three-digit number creation
How many three-digit numbers can be created from the numbers 1, 2, 3, and 4 if you can repeat them? - Balloon percentage remaining
On the first day, 25% of the balloons were sold. On the second day, 45% of the balloons were. How many percents of balloons did they have left on the third day? - Chocolate bar price
Adam and Andrej bought sweets. Adam paid € 2.9 for three chocolates and 2 bars, and Andrej paid € 4 for four chocolates and 3 bars. How much did the chocolate cost, and how much did the bar cost? - 150 percent
One hundred fifty percent of what number is 15? 150% of x is 15. - Tank water height The tank has the shape of a rotating cylinder with a base radius of 6 m reach. Water flows at a speed of 2 liters per second for 3 hours. To what height does the water in the tank?
- Peter František age
Peter and František are 102 years old. František is 12 years younger than Petr. How old is Peter? - Parallelogram perimeter construction
Assembly parallelogram ABCD: AB = 4.8cm, va = 3cm, BC = 4cm. Calculate the circuit. Make a sketch. - Make loss
By selling an item 750, a trader made a 25 percent loss. How much loss did the trader make?
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