Maths practice for 14 year olds - page 146 of 379
Number of problems found: 7564
- Probability 34801
Last year, it rained 12 days in March. What is the probability that it rained on March 20? - Seasonal sale
The bike became cheaper on the seasonal sale by 22%, which is 88 euros. At what price is it sold now? - Mass layoffs
The company's new management has announced that mass layoffs will be necessary due to the poor financial situation. It is estimated that the work that 5 employees did will have to be done by 3 employees. What percentage of the company's employees would lo - Clothes
CZK 2,400 cost clothes: a sweater 150% more than a T-shirt, trousers 2x more than a sweater, and a jacket as a sweater and trousers. What did the individual clothes cost? - 15% of
15% of the revenue from sales was CZK 24,000, and it had to be written off as sales tax. What was the net profit on sales? - Banknotes 34711
55 banknotes worth 133000 CZK, how many 1000 CZK banknotes, how many 2000 CZK banknotes, how many 5000 CZK banknotes if we know that the number of 2000 CZK banknotes is four fewer than the number of 1000 CZK banknotes - Customers 34681
In January, mobile phone owners sent 1,500,000 SMS, which accounted for 75% of all January SMS. How many SMS did customers send in January?
- Broadcasted 34671
On TV, the festival broadcast 5 Belgian films and 3 Dutch films; the remaining 33.3% were from Luxembourg. Thus, the festival broadcast a total of 5 movies. - 120 nuts
Divide 120 nuts in a ratio of 4:6. - Evaluation 34581
There are a total of 26 students in the class. During the evaluation of the control work, the teacher said: "4 pupils got the number one, and that is 16%. "Did all the students write the control work? - Two shops
In two different shops, the same skis had the same price. However, they first became more expensive by 20% and then cheaper by 5%. In the second, they were first cheaper by 5% and then more expensive by 30%, so after these adjustments in the second store, - Tulips
Of the 120 tulips in the garden, 45 are red, 66 are yellow, and the rest are brindle. What percentage of tulips in the garden are brindle? - 14 years
Karl is 14 years old, and Mom is 44. In how many years will MomMom be four times older? - A 36
A 36 g sample of the substance contains 91% water. After drying, the weight of the sample was reduced to 18 g. What percentage of water is now in the sample? - Assignment 34461
The travel agency has reserved 14 triple or quadruple rooms in the hotel for two weeks in July. How many families of three and how many families of four can sign up for the tour if the maximum number of occupied seats in the bus is 50? Assignment and solu
- Bananas and mango
5 kg of bananas and three kilograms of mango cost 146 CZK, and two kilograms of bananas and 5 kilograms of mango cost 142 CZK. How much is a kilogram of bananas, and how many mangoes? - Double-track line
A 160 m long passenger train runs on a double-track line in one direction at a constant speed of 54 km/h, and a 240 m long express train in the opposite direction. a) How fast is the express train if passing the passenger train driver for 6 s? b) How long - Aircraft models
How many car models did the collector own after the collector's market? The collector of car and aircraft models owned three times more car models than aircraft. He sold seven car models and nine aircraft models on the stock exchange and bought 12 car mod - Operations with sets
Set B - A has twice as few elements as set A - B and four times fewer elements than set A ∩ B. How many times more elements does set A have than set B? - Following 34291
The following holds for two non-empty sets, A and B: A ∪ B has 16 elements, A ∩ B has 11 elements, and the set A - B is empty. How many elements does set B-A to have?
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