Arithmetic - math word problems - page 226 of 229

Number of problems found: 4571

Even number writing
Use the digits 3, 4, 5, and 6 to write all even numbers. How many such numbers can you write when you can repeat the numbers?
Nicolas
Nicolas and his father can repair one desk in 1/3 hour. How many desks can they repair in 3 hours?
Scale of voltmeter
Which scale division (scale has 100 divisions) must the voltmeter hand point at a measuring range of 300V if we want to measure a voltage of 100V?
Carbon dioxide
Calculate how many grams of oxygen are in 59 grams of carbon dioxide CO₂. The relative atomic mass of oxygen is 16, and of carbon is 12.
Three dices
What is the probability that the sum of points 14 will be a roll of three dice (B, M, Z)?
Two dice
We roll two dice. What is the probability that the sum of the falling numbers is greater than 3?
Bricklayers
Seven bricklayers will build the house in 630 days. How many bricklayers do we need to take after 150 days to complete the building for (additional) 336 days?
Four-digit number
Find the smallest four-digit number abcd such that the difference (ab)²− (cd)² is a three-digit number written in three identical digits.
Twos
Vojta started writing the number this year, 2019202020192020, into the workbook. And so he kept going. When he wrote 2020 digits, he no longer enjoyed it. How many twos did he write?
Two trains
Two trains departed from City A and City B against each other. They met after some time. The first train took 9 hours to reach city B, and the second took 4 hours to reach city A. In what proportion were the train speeds?
Distance on map
The map's scale is 1:10000. What is the actual distance of 4cm on the map?
Car model
The car model is 52 mm long, and the real car is 4524 mm long. What was the scale of the model car?
Cyclist
A cyclist passes 95 km in 5 hours. How many kilometers did he pass in 8 hours?
Hay supply
Hay stock is enough for four horses for 60 days. How long would this supply last for ten horses?
Four-digit number puzzle
Find all four-digit abcd numbers to which abcd = 20. ab + 16. cd, where ab and cd are double digits numbers from digits a, b, c, and d.
MO Z6-6-1
Write integers greater than 1 to the blanks in the following figure so that each darker box is a product of the numbers in the neighboring lighter boxes. What number is in the middlebox?
Fertilizer
Mr. Gherkin uses for fertilization 7% solution of fertilizer. 9 liters of it still left. How much water must be added to the solution to make only the 4% solution?
AM of three numbers
The number 2010 can be written as the sum of 3 consecutive natural numbers. Determine the arithmetic mean of these numbers.
Dice sum probability
What is the probability that a roll of three dice will result in a number less than 7?
On the board
A problem for dividing two positive numbers was written on the board. David noticed that if he increased the dividend by 2 and the divisor by 7, the quotient would not change. By how much should the divisor be increased so that when the dividend is increa

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