Maths practice for 14 year olds - page 93 of 362
Number of problems found: 7238
- Triangle line ratio
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. - Miloš 2
Miloš works in an optician's. He helps his friend Martin with the selection of lenses for prescription glasses. These can have: - a special anti-scratch treatment, - anti-reflection – ensures greater permeability of light into the eye, - photochromic – da - TV screen width
The diagonal of the TV screen is 82 cm, and the height is 40 cm. Calculate the width of the screen. - Aircraft engine work
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? - Pavement around the house
The pavement around the Vyberar family's house has two parts with a total length of 19 metres. The longer part of the pavement is 1 metre shorter than three times the length of the shorter part of the pavement. Decide for each of the following statements - Friends' meeting
Friends Jenda and Martin live 13 kilometres apart. Jenda went to Martin by bicycle at an average speed of 18 km/h, and Martin at the same moment set out to meet him on a scooter. Half an hour after setting off, they met. a) Calculate in kilometres per hou - Other
On other days, I often see two colours before my eyes — blue and yellow. I feel sad about what is happening. That is why I have a task for you today about colours. I have 5 markers in my pencil case: blue, yellow, green, red, and purple. In 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 in a ratio of 8:1. On Sunday, they sold 147 more child tickets than adult tickets. How many tickets did the amusement park sell on Sunday? - 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? - Tractor hectare plowing
Tractor drivers plow "h" hectares of land per day. How many hectares of land would they have to plow per day to plow the 585 ha area three days earlier than planned? For which "h" does this problem have a positive solution? - Susan 2
Susan packed some sugar into small and large packets. The total mass of 4 large packets and 3 small packets is 43 kg. Each large packet is 2 kg heavier than each small packet. What is the mass of one large packet? - Two numbers
Numbers A and B differ by 95. If from number A we subtract two thirds of it, we get the same result as when we add three fifths to number B. Decide for each of the following statements whether it is true (T) or not (N). a) The larger of the two numbers is - Circle chord distance
The figure shows the circles k₁(S₁; r1=9 cm) and k₂(S2; r2 = 5 cm). Their intersections determine a common chord t 8 cm long. Calculate the center distance |S₁ S₂| in cm to two decimal places. - They divided
Jana, Martina, and Susan divided candies in the ratio 3:7:5. Martina received 9 fewer candies than Jana and Susan combined. Which statement is true? A. Martina received fewer candies than Susan. B. They all received 135 candies together. C. Martina receiv - Ball selection options
We have six balls of different colors. We select two balls at once. How many options? - Length 26
The length of the median of a trapezoid is 10 inches. The median divides the trapezoid into two regions whose areas are in the ratio 3:5. What is the length of the shorter base? - Mark Argie
Mark Argie has P11.50 more than Erwin. Together, the two boys have P131.50. How much does Mark Argie have?
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