Examples of equations for practice for 13 year olds - page 19 of 101
Number of problems found: 2010
- Difference 73754
The difference between two positive integers is 25. One number is 59. What is the other number? - Original 73404
After a 15% discount, the TV cost 357 euros. What was its original price? - Unknown 73244
75 per mille of an unknown number equals 60. What is an unknown number? - Cats and birds
There are 15 cats and birds in the park. There are 42 legs altogether. How many cats are there?
- Magazine's 72894
Shop reduced the magazine price by as many percent as the euro cost the magazine before the price reduction. Find the original price if it costs 16 euros after the discount. - A coffee
A coffee shop owner blends a gourmet brand of coffee with a cheaper brand. Gourmet coffee usually sells for R420,00 per kilogram, while the cheaper brand sells for R180,00 per kilogram. How much of each type should be mixed to have 30 kilograms of coffee - Coffee 6
Coffee worth $1.05 per pound is mixed with coffee worth 85 cents per pound to obtain 20 pounds of a mixture worth 90 cents per pound. How many pounds of each type is used? - 5 times
Find an unknown number; if five times as large as 110 is 1/2 of what number? - Calculate 72594
Karel, Peter, and Milan helped pick apples. It took Karl 30 minutes, Peter 45 minutes, and Milan 36 minutes to turn over one full box of apples. Calculate how long it would take them to acquire 3 full crates together. Mark one answer: a. 32 minutes b. 36
- A man 5
A man secured a loan from a bank and used 1/4 of it for a building project and 1/3 of it for a farm, and 15000 was left. How much did the man secure from the bank? - Adjusting 72554
Two working groups are adjusting the park. The first group would do the work in 15 days, and the second in 25 days. How many days will they do the work together? - Arithmetic 72544
The arithmetic mean of two numbers is 12. The first number is 5. What is the value of the second number? - Length and width
Use the 5-step procedure. The perimeter of a rectangle is 34 in. The length is 4 in less than three times the width. Find the length and width. - Swimming pool 6
We open the first pipe, and then after two hours, we open the second pipe without closing the first. The swimming pool will be filled with both pipes in 4 hours. If we open the first pipe itself, it will fill the pool 1.5 times faster than the second pipe
- Chocolates 72154
Adam and Andrej bought sweets. Adam paid € 2.9 for three chocolates and 2 bars, and Andrej paid € 4 for four chocolates and 3 bars. How much did the chocolate cost, and how much did the bar cost? - 150 percent
One hundred fifty percent of what number is 15? 150% of x is 15. - František 72084
Peter and František are 102 years old. František is 12 years younger than Petr. How old is Peter? - Identical 72024
Four rabbits are 15 cents cheaper than seven identical rabbits. How much do three rabbits cost? - Make loss
By selling an item 750, a trader made a 25 percent loss. How much loss did the trader make?
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Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation? Equations practice problems. Maths practice for 13 year olds.