Math practice for 13 year olds - page 14 of 422
Number of problems found: 8427
- A fruit 4
A fruit seller had some apples. He sells 40% apples and still has 420 apples. How many apples originally he had? - Pole2
4/7 of a pole is in the mud. When 1/3 of it is pulled out, 250 cm is still in the mud. Find the full length of the pole. - Three journeys
If a person covers three equal distances at the speed of 30 km/h, 15 km/h and 10 km/h respectively, then find out the average speed during the whole journey. - Consecutive odd numbers
Find three consecutive odd numbers whose sum is 93. - Visitors 2
Due to decrease in entry fees by 25% the presentation of visitors is increased by 30% . Find the effect of this on the total entry fee? - Two trains 9
A passenger train moving at a speed of 90 km/h leaves a station 6 hours after a goods (freight) train has left the station and overtakes it in 4 hours. What is the speed of the goods train? - Solve 26
Solve percentages question: 75 % of p = 225 - At 5:16
At 5:16, what is the acute angle between a minute hand and an hour hand? - A parallelogram
The area of a parallelogram is 338 m². If its altitude is twice the corresponding base, find the base and the altitude. - Lily spent
Lily had $812. She spent 1/7 of the money on a cupboard and 1/6 of the remaining amount on a dressing table. How much did Lily spend on the dressing table? - Puppy
A family adopts a puppy that weighs seven and 7/8 pounds. Two weeks later, they take him to the vet, and he weighs 12 and 3/16 pounds. How much weight did the pit puppy gain? - Land cost 2
If a 13/18 plot of land is worth 65000 EUR, what is the value of 3/5? - Find value
Find value of x: x/5+x/2=-1/5-3x/2 - Parallelogram - right angles
In parallelogram ABCD; AB = 16 cm, BC = 12 cm and diagonal AC = 20 cm. Find the area of the parallelogram. - The speed 3
The speed of a boat in still water is 10 km/h. If the boat goes 37.5 km upstream in 5 h, find the speed of the stream. - Vertical axis
Find the perpendicular distance of the point A=(5,-7) from the y-axis. - The reflection law
AB is a mirror, PQ is the incident ray, and QR is the reflected ray. If angle PQR = 112°, find angle PQA. - Complement and supplement
Find the measure of an angle if 7 times its complement is 10° less than 3 times its supplement. - An electrician 7
An electrician has to repair an electric fault on a pole 4 meters in height. He needs to reach a point 1 m below the top. What should be the length of the ladder that he could use, when inclined at an angle 60° to the horizontal? - Two discounts 2
A shirt printed with a price of EUR 150 is sold for EUR 105 after two successive discounts. If the second discount is 12.5%, then find the first discount.
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