Math practice for 13 year olds - page 327 of 422

Number of problems found: 8425

Walnuts
x walnuts were in the mission. Dano took 1/4 of the nuts, Michael took 1/8 of the rest, and John took 34 nuts. It stayed here 29 nuts. Determine the original number of nuts.
Hazelnut eating
Denis eats 12 hazelnuts in 1 day. How many more hazelnuts must he eat a day to eat 57 hazelnuts in 3 days if he ate the same amount of nuts every day?
Cone mass
The teacher brought to class two wooden models of cones, which were made of the same type of wood. The first model weighed 800 g. The other had twice the base radius but half the height. Determine the mass of the second cone in grams.
Sides ratio
Calculate the circumference of a triangle with an area of 84 cm² if a:b:c = 10:17:21
Number value
25% of the number x equals 2^-1. What is the value of x?
Rectangle perimeter
Determine the perimeter of the rectangle if its length and width are 2:1 and the area is 98 cm².
Unknown number x
5% from an unknown number equals the number 2⁶. What is the unknown number?
Weightlifter
Weightlifter lifted 75% of its weight. Determine how much weight is lifted when he weighs 132 kg.
Shots
Determine the percentage rate of keeper interventions if 32 shots don't catch four shots.
Number calculation
12% of x is 58 more than (6²) +5. Determine x.
Square root puzzle
Peter had a number in mind and said: When I divide this unknown number by the square root of 27 and then multiply by three, I get an unknown number. What number did Peter think?
Jacket price
The price of the jacket was x €. The coat was first discounted by 12% and then increased in price by 4% of the discounted amount. After discounting and subsequent price increases, the jacket cost exactly 91 euros and 52 cents. Find the original price of t
Expression value
Specify the value of the expression: 1^-4:2^-3
Runner
Peter ran at a speed of 12.4 km/h. After 45 minutes of running, he had a hiatus. The track is 31 km long. How many kilometers is he still to run if he still runs at the same speed?
Brother ages
Milan and Methodius are now 70 years old. Seven years ago, Milan was 1.8 times older than Methodius. Determine how old Milan is now and how many Metoděj is.
Price reduction
The goods became cheaper twice a row, first by 18% and then by 16% of the new amount. After this double reduction, it cost precisely 516 euros and 60 cents. Determine the flood amount of the goods.
Belgium vs Italy
Belgium played a match with Italy and Belgium won by two goals. The match fell a total of 6 goals. Determine the number of goals scored by Belgium and Italy.
Expression value
Express the value of y in the expression: y / 9^(- 1) = 72
Root relationship
Dana and Julia's numbers are different. Dana's number represents the eleventh root of Julkin's number. The sum of their numbers is 2050. Determine what number Dana has and what Julia has.
Arithmetic progression
Determine the sum of the second and fifth AP members if a1 = -4.12, d = -0.7

Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.