Maths practice for 14 year olds - page 75 of 375
Number of problems found: 7493
- Calculate the chord
The circle's radius is r=8.9 cm, and the chord AB of this circle has a length of 16 cm. Calculate the distance of chord AB from the center of the circle. - Trapezoid angle difference
Trapezoid, gamma angle=121°, alpha angle=2 thirds of delta angle. Calculate the angle difference alpha, beta - Swimming training pupils
One hundred seventy-one pupils from the second to fourth years of primary school participated in swimming training. How many of them were from the fourth grade if there were 10% more third graders than second graders and 20% more fourth graders than third - Pencils 4
Pencils, Pens, and Exercise books in a shop are in the ratio of 1:2:3. If there are 12 pencils, the number of exercise books in the shop is: - Bag of marbles
In a bag full of marbles, 1/4 of these marbles are green, 1/8 are blue, 1/2 are yellow, and the remaining 26 are white. How many marbles are blue? - Hand soap
A bottle of hand soap costs $2.50. The same bottle of hand soap went on sale for $2.00. What is the percent decrease in the price of hand soap? - Rectangle - area and width
The length of the rectangle is 1 cm more than its width. Its area is 4 cm². What is its width? - The coordinates 2
The coordinates of the vertices of the triangle shown are A(1,7), B(5,2), and C(5,7). What is the length of segment AB in units? - Kinetic energy
A 100 kg car has a velocity of 15 m/s. What is the car's kinetic energy? - Chocolate gingerbread price
One package of chocolate costs 9 CZK more than one package of gingerbread. Five packages of chocolate were CZK 15 more expensive than 10 packages of gingerbread. How much was a package of chocolates, and how much was a package of gingerbread? - Sum of absolute values
Is it possible for |r| + |s| = |r+s|? If so, when? - Baking 5
Baking 120 kg of bread requires 87 kg of flour. How many kilograms of flour will be needed to bake 400 kg of bread? - The temperature 36
The temperature over the course of a day was being monitored. In the morning, the temperature was −3°F. In the middle of the day, the temperature rose to 12°F. After dark, the temperature dropped again to −6°F. What was the average temperature for the day - Daily balance
For the month of April, each checking account has a balance of $555 for 24 days, $2436 for one day, and $243 for five days. What is the daily balance of the account for April? - Number line middle
Which number lies exactly in the middle between the numbers 258 and 326 on the number line? - The perimeter
The perimeter of a rhombus whose diagonal lengths are in the ratio 3:4 is 40 cm. What is its area in cm²? - Hiker average speed
The hiker walked for 3 hours at a 4 km/h speed. Due to the deteriorating weather, he increased his pace and walked at 7 km/h for the next hour and a half. At the end of his trip, it started to rain, so he started running at a speed of 20 km/h for 30 minut - Unknown number quarter
A quarter of an unknown number multiplied by 4 equals 30% of that unknown number. Determine the unknown number. - Soccer season
Joel is training for soccer season. On Monday, Joel exercises for 20 minutes before school, and 25% of that time is spent playing soccer. On Mondays, he exercises for 60 minutes after school, and 40% of that time is spent playing soccer. What is the total - Hydraulic jack
Hydraulic jack has a capacity of 10 tons. The hydraulic lifter has 6 cm² and 360 cm² pistons. Determine the diameter of the small piston (d) and the force I will create on the piston (F). Design a single-reverse and a double-reverse lever.
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