Maths practice for 14 year olds - page 13 of 379
Number of problems found: 7575
- A reduction
A 40% reduction in the price of mango would enable a buyer to get 2 kg more for Rs 90. Find the initial/original price of mango per kg. - Two pipes 3
Two pipes, A and B, can fill a tank in 15 minutes and 20 minutes, respectively. Both pipes are opened together. After 4 minutes, pipe A is turned off.What is the total time required to fill the tank? - Three 262
Three farmers, A, B, and C, hire meadow for Rs 1460. Farmer A puts in 10 cows for 20 days, farmer B 30 cows for 8 days, and farmer C 16 cows for 9 days. Find the rent paid by each one of them. - Days, hours, minutes
Add the following: 1 day 18 hr 45 m 55 sec, 13 hr 55 m 58 sec and 23 hr 49 m 45 sec - Factorial divisible by 75
Find the least positive integer n such that n! is divisible by 75. - The average 13
The average of 6 consecutive odd numbers is 64. Find the greatest number. - The size 3
The size of a wooden block is 15cm × 12cm × 20cm. How many such blocks will be required to construct a solid wooden cube of minimum size?
- Find area 2
Find the area of the green region in the given picture. Dimensions are shown. - Carol 3
Carol reduces the size of a photo by 30%. If the length of each side is 12 cm, what is the length of the side of the new photo? - Divisors 7 If 540=2²×3³×5, what is the number of all factors of 540?
- Milk with water
How many liters of water are to be mixed in 12 liters of milk costing Rs 40 per liter so that it can be sold at Rs 32 per liter? - Slant height 3
The frustum of a right circular cone has the diameters of base 10 cm of top 6 cm and a height of 5 cm. Find the slant height. - Two angles
If one angle of a parallelogram is 24° less than twice the smallest angle, then find the largest angle of the parallelogram. - Two numbers at a ratio
If 1.5x = 0.04y, then find the value of {(y - x)/(y + x)}. - Students 48
If 80% of the students of a school are boys and 225 are girls, find the number of all students.
- Three workers
A can do a work in 16 hours, and B alone in 24 hours. If A, B, and C work together and finish it in 8 hours, then C alone can finish it in how many hours? - A man 19
A man buys apples at a certain price per dozen and sells them at eight times that price per hundred, find his gain or loss percent - Adjust numerators
If the numerator of a fraction is increased by 2 and the denominator by 1, it becomes 5/8. If the numerator and the denominator of the same fraction are each increased by 1, the fraction becomes 1/2. Find the fraction. - Increase and decrease
A number is first increased by 20% and the resulting number is then decreased by 10%. Find the overall change in the number as percent. - A,B,C,D A, B, C, D are four consecutive odd integers and their average is 42. What is the product of B and D?
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