Math practice for 13 year olds - page 36 of 365
Number of problems found: 7285
- Transformer 3
A 200/115 V transformer has an LV (Low voltage) side resistance of 0.06 Ohm. What is the resistance referred to HV side (high voltage)? - Ronaldo
Ronaldo drove 75 3/5 km in 4 1/2 hours. What was the average speed? - A square 4
A square plot of land has an area of 20.25 ha. The owner fenced it with Three strands of wire. What length of wire did he use for the whole plot? - Patsy
Patsy makes pillows. She needs 232 inches of trim for the edging. Trim costs $5.50 for a 3-yard spool or $1.10 per foot. What is the least amount Patsy can spend to get the trim she needs? Explain your reasoning.
- Dorothy
Dorothy feeds her dog during noon time with 2/5 kilograms of dog food and during night time with 3/7 kilograms of dog food. How much is dog food fed to her dog in a week? - The sum 37
The sum of 5 and one-sixth of a number x is equal to 12 less than x plus 2/5. Find x. - Negative temperature
On a certain day, the temperature is - 12/5°F. After 2 days, the temperature decreases by a factor of 7/3. Find the temperature. - £4.20
£4.20 per 100g; what would 0.118 kg equal? - Percent increase
2.22 to 2.52 What is the percentage increase?
- Trapezoid 52
Trapezoid perimeter = 39a-7. Three sides have the following length: 9a, 5a+1, and 17a-6. What is the length of the fourth side? - Percents 4
900 to 1200. What is the percentage increase? - The difference 4
The difference between four times a number and five is the same as three more than twice a number. Find the number. - The area 4
In square decimeters, how much is the area of a cylinder with a height of 2 dm and a diameter of 1 dm? " - Percentages 10 Pls, convert 1/7 into a percent. What is the solution?
- A number 7
A number is such that if we multiply it by 3/5 and add 4/7 to the product, we get -2/35. Find the number. - Average and mean
Suppose that the average of the four values, {-1, x, -2x, 3}, is equal to x - 1. Find the value of x. - The ratio 10
The ratio of length and breadth of a rectangular park is 3:2, and its perimeter is 150m. Find its area. - The linear
The linear equation 5y-3x-4=0 Can be written in the form y=mx+c. Find the values of m and c. - The total 2
The total price of a car is $17,050 the selling price is $16500. What was the sale tax
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