Maths practice for 12-year-olds - page 78 of 362
Number of problems found: 7228
- 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 - O'clock 78004
What is the degree angle made by the hands of a clock when it points to 8 o'clock? - Cube-shaped 77974
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?
- Femma
Emma mixes 1 7/8 cup of water with 2/3 cup of orange juice as a part of a recipe. How many cups is her mixture? - A molecule
A molecule travels with a speed of 8100 centimeters per minute (cm/min). How far would the molecule travel in centimeters in 3.19 seconds? - Ruby barbecued
Ruby barbecued 3 1/2 kg of meat for her visitors. If she served 5/8 of the barbecue, how much barbecue was left? - Solve 15
Solve equation with fractions 29/12=24/12+?/12 - Convert 4 Convert 2 7/10 into an improper fraction.
- Express 66
Express 6 whole 7/10 hours in minutes. - Adding 11 You are adding numbers. Which of the following numbers to 3/5 will give a whole number? a. 2 b. 2/5 c. 5/3 d. 3/5
- Temp drop
It is 70°F , and the temperature is expected to drop to 85° in the next month. What is the temperature expected to be? - Carbohydrates
Suppose five pieces of candy contain 11 grams of carbohydrates. How many grams of carbohydrates do 20 pieces contain? - Sarah 2
Sarah noticed that the temperature went from 20 degrees and dropped to -10 degrees. Sarah says that the change in temperature is -30 degrees, while her friend Kenya says that the temperature change is 10 degrees. Who is correct? Explain your reasoning
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