Maths practice for 14 year olds - page 208 of 362
Number of problems found: 7230
- Four-Digit Lock Codes
How many four-digit codes on the wheel lock can we create from the digit 0,1,2,3,4,5,6,7,8,9 if it is true that we cannot repeat the numbers? - Rectangle
There is a rectangle with a length of 12 cm and a diagonal 8 cm longer than the width. Calculate the area of a rectangle. - Banknotes
Eve deposited 7800 USD in 50 banknotes in the bank. They had a value of 100 USD and 200 USD. How many were they? - Hens rabbits puzzle
Hens and rabbits, 22 heads and 62 feet, run around the garden. How many? - School Students Girls Percentage
There are 350 boys in the school, 56% of all schoolchildren. How many students are there at school, and how many girls are there? - 600 pencils
Six hundred pencils we want to be divided into three groups. The biggest groups have ten pens more than the smallest. How many ways can this be done? - Triangular pyramid
What is the volume of a regular triangular pyramid with a side 3 cm long? - Block Volume Surface Ratios
The volume of the block is 5760 cm³. For the dimensions of a given block, a: b = 4:3, b: c = 2:5 Calculate its surface. - Did not use
A father, mother, three children, both grandmothers, and both grandfathers were sitting at the table. Three of the family members used both a knife and a fork while eating. This is exactly half of those who used a fork, and exactly three quarters of those - Two parallel chords
The two parallel chords of the circle have the same length of 6 cm and are 8 cm apart. Calculate the radius of the circle. - Cranberries
They brought 65 kg of dried cranberries to the packing house. They made 150-gram and 200-gram packages from them. How many kilograms of cranberries did they use for the smaller 200 packages? How many 200-gram packages were there? - Lake 2
Three brothers were at a cottage on the shore of a circular lake. Every morning Andrej ran around the lake. Simultaneously with him, Braňo jumped into the water in front of the cottage and swam so that he was always midway between the running Andrej and t - Pocket money savings
Zuzana receives pocket money from her parents. In October and November, she managed to save 32 euros. The ratio of cash held in October and November is 6:2. How much did she save in October and November? - Wood beam drying
The raw wood beam weighs 85 kg. It is calculated that drying will reduce its weight in a ratio of 5:6. What will be its weight after drying? - Cuboid Dimensions Ratio Sum
The cuboid’s dimensions are in the ratio of 16:12:8, and the sum of these dimensions is 180 dm. What are the dimensions of the cuboid? - Block edge dimensions How many blocks have integer dimensions of the edges if the surface is 48 m²?
- Year digit product
How many years will elapse from 1 January 2013 before the situation occurs that the product of the digits of a given year is greater than the sum of the digits of that year? A) 87 b) 98 c) 101 d) 102 e) 103 - Pyramid Roof Sheet Metal
The roof of the recreation cottage has the shape of a regular four-sided pyramid with a height of 8 m and a base edge of 4 m. How much ℅ went to folds and joints, and 75.9 square meters of sheet metal were used to cover the roof? - School Excursion Percentage The school director announced that of the 250 children attending the school, every fifth student has the opportunity to participate in the excursion. Then 18% of boys and 23% of girls went on an excursion. Determine how many boys and how many girls attend
- Cake Profit Percentage
The purchase price of the cake is 11.5. The selling price is 16.5. What is the yield in% when selling 950 and 1200 pieces?
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