Maths practice for 12-year-olds - page 81 of 347
Number of problems found: 6923
- Marksman shelter speed
The igniter cord used in normal quarry blasting burns at a rate of 8 mm/s, the length usually used is 60 cm. At what minimum speed must the marksman move to a shelter 150 m away? - A book 3
A book that is printed on both sides has 36 pages. If the book is 3/8 cm thick, determine the thickness of one page in cm. - Cube fabric purchase
How many m³ of fabric do we need to buy to make 20 cubes with an edge of 4.5 dm? - Competitor time difference
The first competitor completed the track in 2h 12min 11s. How much worse was the other's time of 2h 19min 3s? - Your chocolate
Your chocolate chip cookie recipe makes three dozen cookies, but you need four dozen cookies. If the recipe requires 1 7/8 cups of vegetable oil, 2 1/2 teaspoons of almond extract, and 3 1/2 cups of oatmeal, how many ingredients are necessary for four doz - A parking
A parking garage has five levels below ground. Each level is the same height. Consider ground level to be 0. The depth of the fifth level of the parking garage is -118.5 ft. What is the depth of the first level of the parking garage? - Franco, Elliot
Franco and Elliot are on their school's swim team. Last week, Franco swam 5 7/10 miles. Elliot swam 1 1/3 times as far as Franco. How far did Elliot swim? - Pool plan scale A 16 m² swimming pool has an area of 1 m² on the city plan. What is the scale of the city plan?
- The mother
The mother bought 3 3/4 kg of beef, 2 1/4 of pork, and 5 1/4 of chicken. How many kilograms of meat did she buy? - Garden square fence
I bought 51 m of wire, fenced off a square garden, and had 3 m of wire left. What is the size of the garden? - Anthea
Anthea is running an experiment to examine vaccine shelf life, and she must precisely monitor the temperature. The starting temperature is −116 degrees Celsius (°C). The temperature rises by 35 degrees, then falls by 12 a degree. What is the final tempera - Clock hand angle
What is the degree angle made by the hands of a clock when it points to 8 o'clock? - Aquarium shelf space How much shelf space does a cube-shaped aquarium take up if it holds 27 liters of water?
- Drill bit
Bill's 3/8-inch drill bit is missing and needed for a job. He can get by with drilling a smaller hole than 3/8-inch as long as it is as close to 3/8-inch as possible. Which of the following bits would be the best to use? A. 13/32 inch B. 23/64 inch C. 1/2 - Madeline
Madeline is making a quilt. She found some pieces of fabric on sale, each measuring 9/10 of a yard. She will use 2 1/2 of the pieces for the quilt. What is the total length of the fabric she will use? - Manuel Manuel has a rope that is 4 meters long. He cuts away a piece that is 1.06 meters long. How long is the remaining piece of rope?
- Three friends
You and your friends are playing basketball. You make 7 out of 15 shots. Your first friend makes 6 out of 10 shots, and your second friend makes 5 out of 12 shots. Who is the better shooter (write a, b, c)? How would you solve the problem using what you k - Half of the product
What is half the product of 8 1/7 and 7 4/5? - Convert 5 Convert to a mixed number and simplify: 83/6
- Scientific experiment In a scientific experiment, the temperature of a liquid was -12 degrees. If the temperature was increased by 5 degrees, what would the temperature be then?
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
