Maths practice for 12-year-olds - page 5 of 349
Number of problems found: 6965
- 15 years
15 years hence, a man will be just 4 times as old as he was 15 years ago. Find his present age. - Time and distance
A man walking at a speed of 4 km/h can reach a destination in 3 hours. If he increases his speed by 1 km/h, how much time will he save? - A community event
Ana is organizing a community event in San Jose. If each participant gets 3/4 of a sandwich and there are 12 participants, how many sandwiches does Ana need in total? - The sum 49
The sum of two rational numbers is -5. If one of them is -13/6, find the other. - The average 16
The average of 50 numbers is 38. If the two numbers 45 and 55 are not considered, what will be the average of remaining numbers? - Freezing
A certain freezing process requires that room temperature be lowered from 40°C at the rate of 5°C per hour.What will be the room temperature 12 hours after the process begins? - Ones cube
Find the volume of a cube whose total surface area is 6 m². - Time interval Find the time interval between 7:40 AM and 1 : 20 PM.
- The distance 4
The distance between two towns is 120 km there are approximately 8 km in each 5 mi. Which measurement is closest to the number of miles between each two towns? - The store 2
The store owner ordered 3/4 of a sack of sugar. Each sacks of sugar contained 50 kilograms. The supplier sent only 2/3 of the order. How many more kilograms of sugar should the supplier send? - A tank 2
A tank can be filled by a pipe A in 3 hours and by pipe B in 5 hours. When the tank is full, it can be drained by pipe C in 4 hours. If the tank is initially empty and all three pipes are open, how many hours will it take to fill up the tank? - Blank fraction Find unknown fraction: 3/5* blank=2/3
- Two vertically
Two vertically opposite angles are (x-20)° and 85°; then, find the value of x. - The petrol tank
Tinny's car's petrol tank was full. He drove around the city and used 1/4 of the petrol. What fraction of the petrol was left? - Full tank 2
Robert has a full tank of petrol. He drove to Manly and used 1/8 of a tank and then to Gosford using another 4/8 of a tank. What fraction of a tank of petrol has he used? - Central angle 2
What is the arc length of a circle with a radius of 12 cm and a central angle of 255 degrees? A. 8.5 cm B. 12π cm C. 24π cm D. 17π cm - Three girls
Rs.1400 is divided among Amla, Bimla, and Simla so that Amla receives half as much as Bimla, and Bimla receives half as much as Simla. Then Simla's share is: - Ice-creams
Becky and Sam make 6 ice-creams for their friends. On top of each ice cream, they sprinkle 1/3 of a packet of jelly. How many packets of jelly do they need? - A restaurant’s
A restaurant’s menu has 3 appetizers, 3 mains and 2 desserts. In how many way can a 3-course meal be ordered? - Parallel sides
Area of trapezium is 45 sq cm and sum of the length of parallel sides is 15 cm. Find height of the trapezium.
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