Math practice for 13 year olds - page 147 of 414
Number of problems found: 8279
- The bricklayer
The bricklayer built a six-meter base of the fence in 3 hours. How long does it take to build a 14 meters long base? - Dimensions 3
The perimeter of a rectangular field is 96 meters. The length is four meters less than three times the width. Find the length and width (its dimensions). - Number product fraction
What number, when multiplied by 3/5 for the product to be 1? - Fraction equation puzzle
Specify a number whose 2/3 equals -1/2 - Mass fraction
Two teaspoons (24 g) of sugar are dissolved in a cup with 500 g of tea. Calculate the sugar content by weight in the tea. - Salami weight price
500 g of salami costs 4.2 euros. How much do we pay for 0.75 kg of salami? - Arithmetic mean sixth
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? - Worker packing time
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. - Coffee roasting proportion
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 25,000 km per year. Diesel petrol has a consumption rate of 7.4 L per 100 km and costs $1.39 per liter. Unleaded gasoline has a consumption rate of 8.5 L per 100 km and co - 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.
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