Math practice for 13 year olds - page 84 of 422
Number of problems found: 8432
- A shopkeeper 5
A shopkeeper sold some sets of Pencils and Pens. Each set contained 6 pencils and 2 pens. If the shopkeeper sold 112 pencils and pens, how many pens did she sell altogether? - James 6
James and Lisa shared some sweets. James took 2/7 of the sweets, and Lisa took the rest. If James took 18 fewer sweets than Lisa, how many sweets did they have altogether at first? - How many 28
How many can 15cm x 25 cm tiles fit in a room with a length of 3m and a width of 2.5m? - Received 80578
A poultry company received a thousand chickens with an average weight of 1.7 kg at CZK 50/kg. During the day, the company sold 300 chickens for 24 thousand. CZK. What was the average weight of unsold chickens? - Resistance 80577
Three identical resistors connected in series have a total resistance of 9 ohms. What will be their total resistance when connected in parallel - Equilateral 80573
The field has the shape of an equilateral triangle. Calculate its area if you know that the side is 280 meters long. - Nightmares 80568
At the dream market, she offered the Sphinx to a traveler for four dreams, seven illusions, two naps, and one nightmare. Another has seven dreams, four illusions, four naps, and two nightmares. The Sphinx always measures the same for all travelers. How ma - Supplementary angles 4
Angle A and angle B are supplementary. The measure of angle B is 82.5. What is the measure of angle A in degrees? Enter your answer as a decimal, if necessary, like this: 42.5 - Martha 2
Martha is 26 years old, while her nephew is 18 years old. What is the simplest ratio of Martha's age to her nephew's age? - Positive integer integral
How many different sets of a positive integer in the form (x, y, z) satisfy the equation xyz=1400? - Apprentices 80561
The master produced a quarter more products than one of his apprentices. Together they produced 45 products. How many products did the apprentice make, and how many did the master make? - 3-room
Calculate the area of a 3-room apartment if you know that 2 rooms (bedroom and children's) are the same size, both have the shape of a square with sides of 3 m. The living room has the shape of a rectangle with dimensions of 4 m x 5 m. The area of the - Michael 6
Michael was assigned math problems to complete for his weekly homework. So far, he has completed 28 problems, which is 2/7 of the total number of math problems he was assigned. How many total math problems was Michael assigned for homework? - Mark drove
Mark drove 3/4 of a 36 km trip before he stopped to get gas. How many kilometers had Mark driven? - One-nineth as percent
What is 1/9 as a percent? Round to the nearest hundredth. . - Destination 80553
The train traveled along the high-speed line at an average speed of 180 km/h. He left the starting station at 6:00 a.m. and arrived at the destination at 8:40 a.m. But halfway through the journey, he stopped at the station, where he stood for 10 minutes. - Calculate energy
A cheetah weighing 38 kg moves at a speed of 108 km/h. Calculate its kinetic energy. - Electrical 80549
The factory hall is lit by 76 light bulbs, each of which has an input of 200W. Determine how much electrical work will be saved annually if the light is on an average of 100 minutes less per day. Consider 260 business days. - Determines 80548
Find the map's scale, on which a line segment of 15 cm expresses the actual distance of 435 km between Paris and Bern. - Segments 80547
AB segment = 14 cm, divide it into two segments whose lengths are in the ratio 4:3.
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