Maths practice for 11-year-olds. - page 181 of 224

Number of problems found: 4479

Square diagonal
Calculate the diagonal of a square whose area equals 625 square centimeters.
Expression evaluation
For the variables x = 8, y = 12, z = -5, evaluate these two mathematical expressions a = y-z b = z / (x-z)
Fluid
We have vessels containing 7 liters, 5 liters, and 2 liters. The largest container is filled with fluid, and the others are empty. Can you only get 5 liters and two 1 liter of fluid by pouring? How much pouring is needed?
Clotheslines
Mommy needs six clotheslines 360 cm long. Clotheslines are sold in the length of eight meters. How many of these clotheslines must buy mom if any does not want to be connected? How much does mommy pay for the clotheslines when one piece costs 24kč?
Cube measurements
The surface area of one cube wall is 2500 square millimeters. Determine the cube's surface, the length of its edge, and its volume.
Cube 5
The surface area of one cube wall is 32 square centimeters. Determine the length of its edges, its surface, and volume.
Cube edge
Determine the cube's edges when the surface is equal to 37.5 cm square.
Expression - powers
Find the value of the expression: (27^-1) · 9³
Root calculation
What is equal to twice the sixth root of 729?
Change the numbers in the ratio
Change the numbers 29, 38, and 43 in a 3:4 ratio.
Unknown number 5
Daniel thinks of an integer. When he changed this number to a ratio of 2:5, he got the number 2.8. Determine what number Daniel thinks.
Expression value
What is the value of this expression: (0.64^0.5): 4
Number calculation
1/6 of y equals 8.6. Determine y.
Train passengers
Fifty passengers boarded the train at the station. And 79 passengers left it. Find out if more or fewer passengers continued to travel on this train and about how much.
Unknown number 6
Determine x if 1/6 of x equals 2/5 of the number 24.
Number puzzle
Anton said: I have a natural number x. I'll get three times as much if I increase it to four-thirds. What number did Anton mean?
Number ratio
Dano had a natural number in mind. If he changed this number to a 2:5 ratio, he would get the number 24 smaller. What number did Dano think?
Unknown number
Identify an unknown number whose 1/16 is 10.5, less than half of it.
Number ratio
Change the numbers 48, 27, and 36 in a ratio of 5:3.
Exponent ratio
What is the ratio of 2⁸:2^-5 equal?

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