Maths practice for 14 year olds - page 240 of 382
Number of problems found: 7621
- Lunch
Seven classmates go every day for lunch. If they always come to the front in a different order, will it be enough school year to take off all the possibilities? - Cube into sphere
The cube has brushed a sphere as large as possible. Determine how much percent the waste was. - Ticket Sales Three Days
The museum sold seven thousand tickets in 3 days. We know that the second day sold 20% more tickets than the first day, and Day 3 sold 10% less than Day 2. How many tickets were sold on each day? - Digit sum
How many are three-digit numbers that have a digit sum of 6? - Hemispherical hollow
The vessel's hemispherical hollow is filled with water to a height of 10 cm =. How many liters of water are inside if the hollow's inside diameter is d = 28cm? - Right triangle
Calculate the length of the remaining two sides and the angles in the rectangular triangle ABC if a = 10 cm, angle alpha = 18°40'. - Two rectangles
I cut out two rectangles with 54 cm² and 90 cm². Their sides are expressed in whole centimeters. If I put these rectangles together, I get a rectangle with an area of 144 cm². What dimensions can this large rectangle have? Write all options. Explain your - Tea Blend Mixture
A merchant sells a blend of two types of tea at 450 CZK per kilogram. One type costs 900 CZK/kg, and the cheaper type costs 369 CZK/kg. How much of each type is needed for 5 kg of the blend? - Two Numbers Sum Third
Calculate the larger of the two numbers if the smaller number is the third of the larger number, and their sum is 48. - CuSO4 mixture
How many grams of solid CuSO₄ must be added to 450 g of a 15% CuSO₄ solution to produce a 25% solution? - The big clock
The hands of a clock stop at a random moment. What is the probability that: a) the hour hand shows a time between 1:00 and 3:00? b) the minute hand is in the same region as the hour hand as described in part a)? c) the clock shows a time between 21:00 and - Digits
If x, y and z are three consecutive nonzero digits, zyx-xyz = 198, where zyx and xyz are three-digit numbers created from x, y, and z. - Algebra
If x+y=5, find xy (find the product of x and y if x+y = 5) - Intersections
Find the intersections of the function plot with coordinate axes: f (x): y = x + 3/5 - Calculate
Calculate the surface of the cube if its volume is 64 cm³. - Outfit Combination Count
Milan found out that he could wear pants and a T-shirt in a total of 28 different ways. How many T-shirts and pants can he have? List all options. - Bulb 4
In an electric circuit, a bulb (4.5 V, 0.1 A) and a resistor with resistance 45 Ω are connected to a 4.5 V voltage source. Will the bulb shine at full brightness in this circuit? Support your answer with calculations, and possibly look for solutions so th - Triangle measurements
Given a triangle KLM points K [-3.2] L [7, -3] M [8.5]. Calculate the side lengths and perimeter. - Electricity consumption
Calculate how much we will pay for 1 hour of consumed electrical energy if the seller sets a price of 0.126 euros for 1 kWh (all appliances together for 1 hour of work). Table: Appliance ; Power (W) Washing machine ; 2300 W Bulb ; 40 W Refrigerator; 200 W - Glass with icecream
We have six kinds of ice cream and five kinds of fruit. If we put three cups of ice cream and two fruits into each glass, how many uniquely decorated glasses can there be?
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