Math practice for 13 year olds - page 146 of 435
Number of problems found: 8681
- The sum 8
The sum of the two numbers is 21. If three times the smaller numbers are two less than twice the larger number, find the two numbers. - Flowerbeds
There are three square flower beds on the square grassy plot. What percentage is the grassed part of the land when one side is 35 m, and the side of the flowerbed is 10 m? - Josh works
Josh works mowing lawns and babysitting. He earns $7.20 an hour for mowing and $6.80 an hour for babysitting. How much will he earn for 1 hour of mowing and 6 hours of babysitting? - Mohammed
Mohammed grew a garden last year. His plot of land was 6 3/4 feet by 10 feet. This year, he wants to have twice as much area as his garden. How much area will the new garden take up? - Draw a triangle
We have line segments with lengths of 3cm, 5cm, 6cm, 7cm, and 9cm. What is the probability in % that if I randomly select three of them, I will be able to draw a triangle? - You must
You must level a rooftop unit with shims on the curb. If you need to shim the unit 13/16" on one side, how many shims will be required if it is given 1/8" and 1/16" shims? Use ten shims exactly. - Consider 2
Consider the following formula: y = 3 ( x + 5 ) ( x - 2 ). Which of the following formulas is equivalent to this one? A. Y=3x²+9x-30 B. Y=x²+3x-10 C. Y=3x²+3x-10 D. Y=3x²+3x-30.
- The spinner
The spinner below is spun 12 times. It landed on I 4 times, II 7 times, and III 1 time. What is the difference between the experimental and theoretical probabilities of landing on the II? - A toy
A toy store buys kites from a supplier for k dollars. The store owner decides to mark up the price of each kite by 30%. What is the retail price of a kite that the supplier sells for $60? - Limousine rent
Hana rented a limousine for prom. There was a one-time charge of $100 plus an hourly rate of $45. Her total cost for the night was $347.50. How many hours did Hana rent the limo for? - Profit, revenue, cost
Profit, P(x), is the difference between revenue, R(x), and cost, C(x), so P(x) = R(x) - C(x). Which expression represents P(x), if R(x) = 3x3 + 2x - 1 and C(x) = x4 - x2 + 2x + 3? - Run 9
Every time Colin runs, he runs 3/4 of a mile. Whenever Isabel runs, she runs 1/4 of a mile. If Colin runs two times a week, how many times must Isabel run to cover the same distance as Colin? - Subtract 4
Subtract the following decimals. a. 0.98 - 0.053 b. 0.67 - 0.4 c. 0.3 - 0.002 d. 3.2 - .789 e. 6.53 - 4.298 f. 6 - 4.32 g. 7 - 3.574 h. 4.83 - 1.8 i. 3.7 - 1.8 j. 16.17 - 11.632 - Michael 2
Michael has a 35-foot ladder leaning against the side of his house. If the bottom of the ladder is 21 feet away from his house, how many feet above the ground does the ladder touch the house? - Expression money per time
You started this year with $196 saved, and you continue to save an additional $19 per month. Write an algebraic expression to represent the total amount of money saved after m months.
- In the library
The library at Lenape Elementary School has 2/5 as many fiction books as nonfiction books. There are 56 books in the school library. How many books are fiction books? - James 4
James, Priya, and Siobhan work in a grocery store. James makes 8.00 per hour. Priya makes 40% more than James, and Siobhan makes 5% less than Priya. How much does Siobhan make per hour? - Road signs
The total length of a road trip was 18.9 hours. If highway signs are posted every 0.07 hours, including one at the end of the road trip, how many highway signs will there be on the road trip? - Louis
Louis wants to carpet the rectangular floor of his basement. The basement has an area of 5,120 square feet. The width of the basement is 4/5 its length. What is the length of Louis's basement? - The Norris
The Norris family goes out for lunch, and the meal price is 52. The sales tax on the meal is 6%, and the family also leaves a 20% tip on the pre-tax amount. What is the total cost of the meal?
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