Maths practice for 12-year-olds - page 87 of 349

Number of problems found: 6971

There 22
There is 5/8 of a pizza in one box and 9/12 of a pizza in another box. How much do you have altogether?
Work space
Every person in a conference room must have at least 36 square feet of workspace. A conference room is 28 by 20 ft. find the maximum number of people the room can accommodate.
Johnny 2
Johnny spends 1/2 of his salary on his family, 1/6 on personal expenses, and 1/9 on convenience, and he saves the rest. What fraction of his salary does he have? How much money does he save from his salary of $180?
Sphere diameter
The sphere has a diameter of 70 cm. Calculate its surface area and volume.
Sophomores
There are 3200 students at Lake High School, and 3/8 of these are sophomores. If 3/5 of the sophomores favor the school forming a crew team and 7/10 of the remaining students (not sophomores) are in favor of forming a crew team, how many students are oppo
The temperature 34
The temperature on a maths exam day went down 2°C and then 3°C ending up as a final temperature of 27°C. What was starting temperature?
Divisible 73494
What digit should X replace so that the number 6X94 is divisible by nine?
ABC gifts
Arthur had 30 dollars to spend on three gifts. He spent 9 3/4 dollars on gift A and 4 1/2 dollars on gift B. How much money did he have left for gift C?
Calculate 73434
Calculate the volume and surface area of the cone with a diameter of 20 cm and a height of 15 cm.
Divide 73414
Divide the number 34 in the ratio of 3:4:10.
Calculation 73364
From the number 5,4,0,7,8, create three-digit numbers, so they do not repeat and solve the problem by calculation.
Car's mileage
A car owner has her tank filled and notices that the odometer reads 14,368.7 kilometers. After a trip in the country, it takes 34.5 liters to fill the tank, and the odometer reads 14,651.6. How many kilometers per liter is this car getting?
Perpendicular 73264
The perimeter of a right triangle is equal to 30 centimeters. Calculate the perpendicular b if a = 5 centimeters and c = 13 centimeters. A natural number expresses the length of the perpendicular b.
Centi-year 73254
How many minutes is the centi-year longer / shorter than a deca-month? The year is 365 days, and the month is 30 days.
Two boxes 2
The students filled two boxes with 5-peso coins. Box A has 300 5-peso coins, and Box B has 450 coins. In what way is the volume of box A lesser or smaller than the volume of box B? Explain your answer.
Calculate 73134
The wooden prism weighs 5 kg and has a 700 kg/m³ density. Calculate the volume of the wooden prism.
Two-thirds 73104
The company has 120 employees, two-thirds of whom are women. Of the women, only a quarter speak both English and German. How many women talk in English and German?
Reecha
Reecha has a picture frame that is 13 1/2 inches wide. How many pictures that are 3 3/8 inches wide can be placed beside each other within the frame?
T-shirts 73074
Dušan has 8 T-shirts and three pairs of shorts in his closet. How many ways can he dress for school?
A person
A person buys 10 kg of commodity A at a rate of 2 kg per dollar, 20 kg of commodity b at a rate of 5 kilograms per dollar, and 30 kg of commodity C at a rate of 10 kg per dollar. Find the average price of kg per dollar.

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