Math practice for 13 year olds - page 122 of 414
Number of problems found: 8262
- Tourist bench seating
Benches were prepared around the fire. When seven tourists sit on them, one tourist will sit alone on the last bench. When six of them all sat down, one had to stand. How many tourists were at the campfire if we know there were less than 100, and how many - Trapezoid coordinate drawing
Draw a trapezoid in the coordinate system with bases 4 cm long, 2 cm long, and 3 cm high. Please write down the coordinates of its vertices. - Stair climbing performance
A person weighing 50 kg can climb 15 stairs. One step is 18 cm high. Determine a person's performance when: a) slowly climbing the stairs if it took him 13 seconds b) going down the stairs slowly if it took him 10 seconds c) quickly climbing the stairs if - Board triangle ratio
From a rectangular board with 2 m and 3 m dimensions, we cut isosceles and right-angled triangles at the corners with an overhang of 40 cm. Calculate the ratio of the rest of the board's areas to its total original area. - Cylinder cube water
We placed the largest possible lead cylinder inside a 1-litre cubic container. How many decilitres of water will now fit in the container? - Bank interest rate
Mr. Adam and Mr. Milo each deposited 20,000 euros in their bank. After the first year, Mr. Adam added 600 euros and Mr. Milo 550 euros. What was the interest rate of each bank? - Housing loan interest
How big would the Novak family take out a housing loan if they paid an interest of 5500 euros after the first year and the interest rate of this loan was 5.5% p. and.? - Quadrilateral prism
Calculate the surface and volume of a quadrilateral prism if given: the area of the base is 40 cm², the bottom of the base is k = 8 cm, and the height of the prism is 1.3 dm (the bottom is a rectangle) - Line ratio enlargement
A line segment 8 cm long is enlarged in the ratio 7:4. How long in centimetres will the new segment be? - Basketball team
The average height of the basketball team's starting five players is 196 cm. The tallest player is 216 cm tall. What is the average height of the remaining four players in centimetres? - Hexagonal prism volume
Calculate the volume and surface of a regular hexagonal prism with a height v = 2 cm and a base edge a = 8 cm. - Sandwiches
In a cafeteria, 1/6 of the students eat salads, and 2/3 eat sandwiches. There are 18 students in the cafeteria. How many students are eating lunches other than salads or sandwiches? - Expression value substitution
Specify the value of the expression, (3x-5) / (2x + 1) if x equals the value that will be in the reader after substitution. - Pool filling time
How long in an hour will a 30 m, 15 m, and 2 m pool be filled with water flowing at 900 l / min if it is 90% full? - Number logical sequence
The numbers are arranged in a specific logical order. Fill in the missing numbers. 5, 8, 16, 15, 18, 36, 35, 38,??, - Mr. Bradshaw
Mr. Bradshaw is leaning a ladder against the side of his house to repair the roof. The top of the ladder reaches the roof, which is 5 meters high. The ladder's base is 1 meter away from the house, where Mr. Bradshaw's son is holding it steady. How long is - For last
Last week, the temperature varied by a total of 17 degrees over the course of the day. If the high for the day was 10 degrees, what was the low? (Write a number sentence and solve it.) - Starter current flow
Determine the current flowing through the car's starter, whose resistance is 60 milliohms at 12 V. - Resistor series connection
Two resistors with resistances of 40 ohms and 60 ohms are connected in series and connected to a voltage of 150 V. A) the total resistance B) current in the circuit C) voltage on both resistors - Handset voltage resistance
The handset has a resistance of 4000 ohms. Calculate what voltage is connected to them if the current passes 2.5 mA.
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