Math practice for 13 year olds - page 141 of 434
Number of problems found: 8675
- Salami 54461
500 g of salami costs 4.2 euros. How much do we pay for 0.75 kg of salami? - Arithmetic 54441
The arithmetic mean of the six numbers is precisely 9.5. The sum of these five numbers is 56.9. The sixth number is? - Water tank
There is water in the block-shaped tank with dimensions of 3 m, 1.5 m 5 m. It occupies 70% of the tank volume. Find the volume of water in the tank (in hl). - Taxes
If you were charged $243 in taxes on a $4,050 purchase, what percent tax were you charged? - Sale goods
The supermarket reduced the sale of goods twice. First by 15% and another 20% of the new price. What percentage of the original price was the final price? - Workers 54253
Four workers packed the goods with the same output in 6 hours. In how many hours would five workers do the same job? Express it in hours and minutes. - Obtained 54243
We obtained 4200 g of roasted coffee from 5 kg of green coffee. How many g of green coffee do we need to roast to get 10 kg of roasted coffee?
- A diesel car
A diesel car costs $2599 more than an unleaded petrol car and travels an average of 25,000km per year. Diesel petrol has a consumption rate of 7.4L per 100km and costs $1.39 per liter. Unleaded gasoline has a consumption rate of 8.5L per 100km and costs $ - Three integers
Three consecutive integers add up to 51. what are these integers? - The sum 16
The sum of A and B is 36. The difference between A & B is 8. Find the larger number. - Multiplicative inverse
Explain why the reciprocal of - 1 1/17 is the multiplicative inverse of - 17/18. - Two fraction equation
Find the d value of q in equation 30/16=q/48. - Insurance 2
A house valued at 255,000 euros has been insured for 224,000 euros. What percent has it been insured? - A class IV.C
In a class, 2/5 were boys. Thirty were girls. How many more girls than boys are there? - Calculate 20
Calculate the sum of 1/5 of a right angle, 3/4 of a right angle, and 3/4 of a straight angle.
- Comparing exponents
A) 8 (6²)(8²) b) 16 (6²)(8²) c) (6¹+²) (8²) - Over fraction
Solve an equation: p over 5 equals fraction numerator 7 p over denominator six end fraction plus 5. - Regular price
The sale price of a television is 7200. The discount rate is 40%. Find its regular price. - Taken away from number
18 is taken away from 8 times, and the number is 30. Find the number. - The average 4
The average cost price of a car in Ireland is now €26,430, excluding VAT. If VAT is 23%, calculate the actual selling price of a car in 2021.
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