Maths practice for 14 year olds - page 8 of 376
Number of problems found: 7519
- Selling the article
If an article is sold at a gain of 6% instead of at a loss of 6%, then the seller gets 6 euros more. Find the cost price of the article. - Single discount 3
What will be the single equivalent discount for successive discounts of 10%, 20%, and 15% on marked price? - Move the average
If the average of 5 numbers is 20, the number which should be added to first number to make the average becomes 30? - One half of students
There are 1200 students in the school. Of which 600 are girls. Find the percentage of boys. - Test and exam
1100 boys and 700 girls appeared in a test. If 42% of boys and 36% of girls passed, then find the percentage of students who failed. - A box of paisa
A box cointains 261 coins valued 20 paisa, 25 paisa and 50 paisa. Their values in ruppies are in the ratio of 7:8:10. Find the number of 25 paisa coins. One Rupee 100 Paise or we can also write it like 100 Paise 1 Rupee. - South and then east
William walks 16 m south from his house and turns east to walk 63 m to reach his friend's house. While returning, he walks diagonally from his friend's house to reach back to his house. What distance did he walk while returning?
- A solution 2
To a solution of 30 litres containing 90% alcohol, how much water must be added to so that the alcohol becomes 80%? - A train 5
A train travels from Brno to Aš at a speed of 45 km/h and returns back at a speed of 36 km/h. Find the average speed of the train. - A train 4 A train passes two bridges of 400 m and 260 m in 25 sec and 18 sec, respectively. Find the length and speed of the train.
- Average age 4
The average age of 31 people in a group is 19. If one person is reduced to 18, the average age becomes 18. Find the age of the reducing person. - One-third 18
One-third of a certain journey was covered at the speed of 20 km/h, one-fourth at 30 km/h, and the rest at the speed of 50 km/h. Find the average speed of the whole journey. - Revolving to cone
A triangle whose sides are 20 cm, 16 cm, and 12 cm is revolving around its greatest side as axis. What is the volume space it generates after a full revolution in cubic centimeters? - Football and cricket
In a school 40% of the students play football and 50% play cricket. If 18% of the students neither play football nor cricket, then find the percentage of the students playing both. - A man 23
A man standing on the deck of a ship, which is 10 m above the water level, observes the angle of elevation of the top of a hill as 60°, and angle of depression of the base of the hill is 30°. Find the distance of the hill from the ship and the height of t
- Play with mean
The sum of few numbers is 450 and their mean is 50 and if another number 100 is included, the mean would be? - A boat 3
A boat takes 1 hour longer to go 36 km up a river than to return. If the river flows at 3 km/h, find the rate at which the boat travels in still water. - Quadrilateral angles in AP
The four angles of a quadrilateral form an arithmetic progression. If the common difference is 15°, then find all the angles. - Of three
Of three positive numbers the product of the first and second is 42, second and third is 56 and that of third and first is 48. Find the third number. - Big cities
City A has a population of 136000 which is decreasing at the rate of 2400/yr. City B has a population of 84000 which is increasing at the rate of 1600/yr.In how years will the population of two cities become equal?
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