Maths practice for 12-year-olds - page 24 of 354

Number of problems found: 7064

Three 237
Three vertices of a rectangle have the coordinates (5, 3), (5, -1), (-1, -1). What are the coordinates of the fourth vertex of the rectangle?
Tax bill
What is the tax bill for a contractor if his shop has an assessed valuation of $75,000, and the tax rate is $27.50 per thousand dollars of assessed valuation?
The rectangle 6
The rectangle shown has a length (l) of 8 and a width (w) of 6.2. A second rectangle has a length of l + 2.5 and a width of w - 1.4. Find the area of the SECOND rectangle. (The area is in square units.)
Mary spends
Mary spends 2 1/8 hours running and also spends 1 5/7 hours at the mall. How much less time does Mary spend at the mall compared to running?
Earning
If you earn 50 ¾ dollars on Monday and 75 ¼ dollars on Tuesday, then what is the total amount of money that you earned?
The volume 9
The volume of a large tank is 210 yd³. It is 2 2/5 yd wide and 2 4/5 yd high. What is the length of the tank?
Sushant
Sushant reads 1/3 of a book in one hour. How many parts of the book will be read in 2 and 1/5 hours?
Edith
Edith wants to cut pieces of ribbon 1/3 meter long from a piece of 5/6 meter. How many pieces can be cut?
A cupcake
A cupcake takes just 1/4 of an hour to bake. How can cupcakes bake in 1 1/2 hours?
A biker
A biker traveled from city A to city B via city C with a uniform speed of 52 km/h. He then returned directly to city A with a uniform speed of 89 km/h. Find, in minutes, the total time of his whole journey to two decimal places. City distance A from B is
Bella
Bella collected 3/5 of a bin of glass bottles to recycle. Ian collected 9 times as many bins as Bella. How many bins of bottles did Ian collect?
Change 8
Change this mixed number into an improper fraction of 2 1/9
Jane and tent
Jane and her father were going to the tent. They found that their old tent was torn. Their mother suggested that they sew a tent whose walls would be made of 4 identical isosceles triangles. Their lower side is 2 m long, and the height is also 2 m. Then,
An electorate
In an electorate, 3/4 th of the voters are Tamils. Of the remaining 2/3 rd are Muslims, and the others are Sinhalese. If the number of Sinhalese in that electorate is 587, find the number of voters in that electorate.
Rene drank
Rene drank some cola from a 500 ml bottle. He found that 2/5 was remaining. How much did he drink?
Elton
Elton is n years old now. How old was he 8 years ago? How old will he be 16 years from now? If his age in 16 years time will be four times his age 8 years ago, how old is he now?
Feed rate
The feed rate of a drill is the distance it advances with each revolution. If a drill makes 320 rpm and drills a hole 2.625 inches deep in 1.8 minutes, what is the feed rate?
The temperature 47
The temperature in a garden at midnight was −3 degrees Celsius. By 6 AM, the temperature was −8 degrees Celsius. What is the difference in the temperature?
The minute
The minute hand of a clock is 6 cm long. Find the area it sweeps between 2:05 PM and 2:40 PM.
Water 71
Water was heated to 80 °C then allowed to cool at a rate of 6 °C per minute. After how long was the temperature 8 °C?

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