Maths practice for 12-year-olds - page 266 of 359
Number of problems found: 7167
- Photo enlarge
Mark wants to enlarge a 4-inch by 6-inch photo to 15 inches in height. Use a ratio table to determine the new width of the photo. - Oak cuboid
Oak timber is rectangular shaped with 2m, 30 cm, and 15 cm dimensions. Its weight is 70 kg. Calculate the weight of 1 dm³ of timber. - Fraction of a time
Express a fraction of what a 24-hour portion is, 80 minutes. - Pool filling
The pool had to be filled before the World Championships. The first pump would fill in 12 hours, the second in 15 hours, and if all three pumps were started simultaneously, they would fill the pool in 4 hours. How long would the pool be filled with only t - Bills count
Dad had 33 bills. One hundred crowns, two hundred and five hundred. A two-digit number gave the number of each species. How many did he have if he had a total of 9100 CZK? - Postage stamps
There were 301 postage stamps in the desk drawer. They were stamps for 2, 3, and 5 crowns. The number of each species can be written as a three-digit number. The total price of all stamps is CZK 1,003. How many stamps were there? - Coin count
Eve had seven coins. Crowns, two-crowns, and five-crowns. At least two of each. How many did she have if she could buy three packs of gum for six crowns? - Map scales
Two places have a distance of 4 cm on a map with a scale of 1:75 000. What is their distance on a 1:50,000 scale map? - Equation solving
a) 5 + 4x = 5x-22 b) 8y-49 = y-4 - Chronicle cipher
From the beginning of the year, students in 4th grade wrote a chronicle. She had everything they had together, and they cared a lot about her. But one day, the chronicle was lost. Five students were left to search for everything on Monday after the class. - Tunnel travel time
How long will a 1 km long tunnel take to travel at a speed of 100 km per hour? - Runners lapping
Two runners run on a 3200 m oval track, one running at 12 km/h and the other at 8 km/h. How long does it take for the first runner to finish the second one? - Megapascals
What is the area of cross-section of the piston if the force of 300 kN produces a pressure of 5 MPa? - Tomato sticks
The gardener has ten sticks 160 cm long and five sticks 220 cm long. If each stick is 7 cm long, how many tomato sticks can it make? - Gear wheels
There are two gears in the wall clock. The larger wheel has 54 teeth, and the smaller one has 24 teeth. How many times does the small wheel turn if the big one turns four times? - Ounce
749 calories in a 7 - ounce serving. What is the unit rate? - Bicycles
You're the owner of the transport's learning playground. Buy bicycles of two colors, but you've got to spend accurately 120000 CZK. The Blue bike costs 3600 CZK and the red bicycle 3200 CZK. - Rainwater barrel
There are 1.5 hectoliters of rainwater in the barrel. Two-fifths of the water passed from the barrel while watering the garden. How many liters of water remained in the barrel? - Apple harvest
Pupils collected a total of 42 kg of apples. Peter harvests half as much as Susan and Martin, a third less than Peter. How much did each of them harvest? - School 6
Jirka lives 600m from the school, and Honzík 1200m. How many kilometers a week does Honzik go over Jirka on his way to school and back? How many times will more Honzík go than Jirka?
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