Maths practice for 12-year-olds - page 79 of 354

Number of problems found: 7066

Wood board density
Calculate the density of wood, which is a board with a volume of 0.2 cubic meters weighing 100 kg.
City path count
There are 5 roads from city A to city B, 3 from city B to city C, and 4 from city C to city D. Determine the number of paths that go from A to D via B and C.
Four-digit natural numbers
Determine the number of all four-digit natural numbers in decimal notation in which the digit 0 is not present, and each of the remaining nine numbers occurs at most once.
Diet liquid solid
The ratio of the number of liquids to the solid components of the diet in (kg) should be about 7:2. Show in a rectangular coordinate system the dependence of the amount of a solid food component on its total amount.
A counter
A counter ticket costs $18.79. If you're going to buy seven tickets plus a parking pass that costs $10, what would the total cost be?
Cube edge surface
The length of the cube's edge in cm is expressed as a natural number. Its volume is greater than 100 and less than 200. Calculate the surface area of the cube.
Student divisibility lies
The teacher wrote a number less than 50,000 on the board. The first student said: This number is divisible by 2 The second student said: This number is divisible by 3 And so on, down to the last one who claimed it was divisible by 13. Two in a row lied. W
Playground volleyball area
In Kocourkov, they decided to build a children's playground and volleyball courts. The volleyball court will have dimensions of 18 m x 19 m. The playground will have a square shape. The area of both fields will be the same. What will be the dimensions of
Paper rolls
The cost, c, of paper towels, based on the number of rolls, r, is given by this equation: c=1.29r What is the unit rate of the cost of the paper towels in dollars per roll?
Bus passenger fractions
There are 45 seats on the bus. Six passengers are standing, and the remaining 18 are seated. What fraction of passengers are standing? What proportion of passengers are seated? How many seats are unoccupied? How many people would have to be on the bus to
Number fraction comparison
How much is two-sevenths of 420 less than three-eighths of 960?
Mr. Stratton
Mr. Stratton has a flower garden. Of the flowers in his garden, 1/3 of them are roses, and 3/5 of the roses are red. What fraction of Mr. Stratton's flowers are red roses?
Lake map area
A lake with an area of 3 cm² is drawn in the 1:50,000 scale map. Determine the actual size of the lake.
Hamburger seller price
Two sellers, each in their stand, sold hamburgers at the same price, expressed as a natural number in CZK greater than 30. The first seller received 1260 CZK, and the second received only 792 CZK. How much CZK did 1 hamburger cost? How many hamburgers did
Two fractions multiply
What is ⅔ × ⅚?
Bryon
Bryon has 1 7/10 kilogram of black pepper. He uses 7/8 of the pepper and splits it between 7 pepper shakers. How much pepper will be in each shaker?
Paul ate
Paul ate 2/8 of a cake and his brother 3/8. What fraction of the cake is left for the parents?
Fifteen 5
Fifteen more than five times a number equals the difference between −57 and three times the number. Find this integer.
Value of a expression
Find the value of 5(11) − 10² − 15 + 20.
Statistical deviation
Our school has 59 pupils in year 5, 52 in year 6, 86 in year 7, 70 in year 8, and 71 pupils in year 9. a) Determine what the statistical population is. b) Determine what the statistical unit is. c) Determine what the statistical variable is. d) Record the

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