Math practice for 13 year olds - page 11 of 429
Number of problems found: 8564
- A shopkeeper 6
A shopkeeper allows 40% discount on the marked price and there is a loss of 30%. Find the profit percent if it is sold at the marked price. - Ann and Susan
The difference between the present ages of Ann and Susan is 6 years. After 4 years ratio will be 3:4. What can be the present age of Susan? - A period
A period of 4 hrs 30 min is what percent of a day? - The tea
If the price of tea is increased by 20%, by how much percent must the consumption of tea be diminished so as not to increased the expenditure? - Workers
If x men can complete a work in 8 days and x+4 men can complete the same work in 6 days. Find the value of x. - Two articles
A shopkeeper bought two articles each at Rs.800. There was 25% profit on one and 25% loss on the other. Find the total percentage profit or loss in the whole transaction. - The tent 3
The top of a 1.3 meters tall tent is tethered to the ground by a cable. The cable makes a 37 degrees angle with the ground. Find the cable length. - A discount 2
A discount of 52.50 dollars is obtained if a discount of 15% is allowed. Find the marked price and the selling price. - A man 21
A man sells a bicycle at a profit of 25%. Had he bought it at a price less by 25% and sold it at 250 euro less then also he could have made a profit of 25%. Find cost price. - Mean proportional
If x+7 is the mean proportional between (x+3) and (x+12), find the value of x . - Three girls
Rs.1400 is divided among Amla, Bimla, and Simla so that Amla receives half as much as Bimla, and Bimla receives half as much as Simla. Then Simla's share is: - The HCF
The HCF of two numbers is 18 and their product is 12960. Their LCM will be - Missing side length
Use the Pythagorean Theorem (a² + b²=c²) to find a unknown side length: a = 5; c = 13 ; b=? - Multiple and remainder
What is the least multiple of 7, which, when divided by each one of 6,9,15,18, gives the remainder of 4 in each case? - A boat 2
A boat can travel with a speed of 13 km/h in still water.If the speed speed of stream is 4 km/h, then find the time taken 1) to go 68 km downstream . 2) to go 63 km upstream . - A passenger
A passenger train, 150 m long, passes a railway platform, 200 m long, in 35 seconds. Find: 1) speed of the train in km/h 2) the time taken by the train to pass a man cycling in the direction of the train at the rate of 9 km/h. - The first
The first 300 km of a journey is covered in 10/3 hours, and the remaining journey is covered in 8/3 hours at 75 km/h. Find the average speed of the whole journey. - An election
In an election between two candidates, one candidate secured 43% of the total votes polled and lost the election by 4900 votes. Find the total number of votes polled. - Two sets 2
If X and Y are two sets such that X ∪ Y has 50 elements, X has 28 elements and Y has 32 elements, how many elements does X ⋂ Y have? - Telephones
The cost of manufacturing x telephones by Josh Mobiles is given by C = 500 + 45x, and the revenue from selling these are given by R = 65x. How many telephones must be produced and sold in order to realize a profit?
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