# Arithmetic - math problems

#### Number of problems found: 2228

• At midmorning
The temperature at midmorning was 31°C. Early in the evening, the temperature dropped by 5°C. What was the resulting temperature?
• Annual growth
The population has grown from 25,000 to 33,600 in 10 years. Calculate what was the average annual population growth in%?
• Biking
Dhea is biking for 20 mins every day before going to school. She looked at her watch and she already achieved 10 hours of biking. How many days in total did she achieve?
• Granddaughter
In 2014, the sum of the ages of Meghan's aunt, her daughter and her granddaughter was equal to 100 years. In what year was the granddaughter born, if we know that the age of each can be expressed as the power of two?
• Trip cost
In September, the trip cost CZK 12,000. How many crowns did the trip cost in June of the same year, when they have since reduced the price by a quarter and by another CZK 1,200?
• Calculate
Calculate the height of an isosceles triangle with base 37.8 mm long and an arm 23.1 mm long.
• Fraction to decimal infinite
Determine which digit is at 1000th place after the decimal point in the decimal expansion of the fraction 9/28.
• Below sea level
A submarine was situated 800 ft. Below sea level. If it ascends 250 ft. , What is its new position? (Hint: Below sea level implies negative integer).
• Clock mathematics
If it is now 7:38 pm, what time will it be in 30,033,996,480 minutes from now?
• Harmonic mean
If x, y, z form a harmonic progression, then y is the harmonic mean of x and z. Find the harmonic mean of the numbers 6 and 5.
• HP - harmonic progression 2
Compute the 16th term of the HP if the 6th and 11th term of the harmonic progression are 10 and 18 respectively.
• HP - harmonic progression
Determine the 10th term of the harmonic progression 6,4,3,…
• Cube containers
Replace the two cube-shaped containers with 0.8 dm and 0.6 dm edges with a single cube-shaped one so that it has the same volume as the two original ones together. What is the length of the edge of this cube?
• Cuboid edges
The lengths of the cuboid edges are in the ratio 2: 3: 4. Find their length if you know that the surface of the cuboid is 468 m2.
• The temperature 10
The temperature in a freezer is -15°C, and it increases by 3°C.
• Eight chairs
There are eight chairs by the table and one more child sitting on each one. There are two times more girls than boys. How many girls and how many boys can there be?
• The cube
The cube has a surface of 600 cm2. What is its volume?
• The same
The same number of rabbits and hens are running on the farm. 468 feet run around the yard. How many rabbits and hens do they have on the farm?
• Seasonal sale
The bike became cheaper on the seasonal sale by 22%, which is 88 euros. At what price is it sold now?
• An airplane
An airplane flies 1440 km in 2 1/4 hours. What is its average speed in km per hour?

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.

We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...