Maths practice for 14 year olds - page 87 of 378
Number of problems found: 7551
- Teacher 3
Teacher Ken is interested in buying a jacket at a discounted price. The price tag says the original price is Php 1250, which is 20% off. What would be his change if he gave the cashier Php 1000? - The price 3
The price of a notebook is 20 percent less than that of a book. By what percent is the book's price higher than the price of the notebook? - Shoulders 69284
Two children with different weights sit on the swing, a lever with your shoulders. On the left side sits a child with a capacity of 30 kg, and on the right, a child with a capacity of 20 kg. One swing arm is 150 cm long. How would you seat the children so - Three-member 69274
The teacher wants to create one three-member team of four girls and four boys, with one girl and two boys. How many different options does it have to create a team? - Grandmother's 69254
The grandmother and granddaughter Julia harvest currants in 15 hours of work together. Julia would harvest currants for ten days after 6 hours of work a day. a) Determine in hours how long the harvest would have taken for her grandmother if Julča had not - Magnification 69234
What magnification of magnifying glass in percent if the magnification is 4x? - Pre-Christmas 69224
The new type of PC became 15% more expensive before Christmas and is now being sold for CZK 13,800, which is 80% of the pre-Christmas (already higher) price. What was the original price of the PC before the price increase?
- Consumption 69174
The tower's roof has the shape of the shell of a rotating cone with a base diameter of 4.3 m. The deviation of the side from the plane of the base is 36°. Calculate the consumption of sheet metal to cover the roof, assuming 8% for waste. - Spherical layer
What is the volume of the spherical layer that remains after cutting the paragraphs on both sides of the ball, whose height is 3.5 cm? Is the diameter of the ball 24 cm? - Pump power
Determine the pump power if: I pour 3 m³ of water from the tank in 120 seconds with a hose. The height of the hose mouth above the tank is 1.5 m. The water's speed from the hose outlet is 20 m/s. - Triangle 69144
The line p passes through the center of gravity T of the triangle and is parallel to the line BC. What is the ratio of the area of the divided smaller part of the triangle by the line p? What is the area of the triangle? - Fraction and ratios
Fraction and ratios are different names for the same thing. - Calculate 69104
The diagonal of the TV screen is 82 cm, and the height is 40 cm. Calculate the width of the screen. - Increasing 69094
The aircraft weighs 61 tons. It climbed from a height of 1000 m to a height of 3000 m while increasing the speed from 170 m/s to 210 m/s. What work did the aircraft engines do? - Sarrah
Sarrah bought cupcakes for her family. Thirty-six cupcakes are chocolate, and the rest are red velvet. If 80% of all the cupcakes she bought are chocolate, how many red velvet cupcakes did she buy?
- Other
On other days, I often see two colors in front of my eyes - blue and yellow. I feel sad about what is happening. That is why I have a role for you today about colors. I have 5 markers in my pencil case: blue, yellow, green, red, and purple. How many ways - Reverse percentages
A washing machine that is on sale has a price tag of R 1 240, representing a discount of 22.5% off the original price. What was the original price? - An amusement 2
An amusement park sells child and adult tickets at a ratio of 8:1. On Sunday, they sold 147 more child tickets than adult tickets. How many tickets did the amusement party sell on Sunday? - Neziswa
Neziswa is conducting an experiment in which the temperature is measured carefully. The temperature was 76°C at the end of the first minute, and then it fell by 5°C every minute. Determine a formula to calculate the temperature (T) after m minutes. - The average 5
The average of the two numbers is 9.5. One of the numbers is 11. What is the value of the other number?
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