Math practice for 13 year olds - page 23 of 422

Number of problems found: 8424

Usain
Usain and Kyle rented a house together for 3 years. Usain paid more rent because he had a bigger room. They always split the rent at a ratio of 4:3. They paid £30247 in rent over this period. How much of this did Usain pay?
Estimate and exact
A) estimate 0.34 x 0.063 by rounding both numbers to one significant figure b) work out the exact value of 0.34 x 0.063 compare answers to parts a) and b)
Sqrt of sum
Find one-third of the square root of 81, the sum of 12, and the product of 3 and 12.
Linda
Linda gave her sister 2/5 of her money, spent 1/3, and saved the remainder. If Linda saved $28.00, how much money did she have at first?
Dostaneli
If we get 5% of the amount that Petr has in his wallet and 4% of the amount that Paul has with him, we will have 46 CZK. However, if we get 4% from Peter's and 5% from Paul's, we will only have 44 CZK. How many crowns do Petr and Paul have with them?
Twice squared
If the square of twice a number is 81, what is the number? Give a positive number x.
There 35
There are three points on a straight line: A, BC. If CD = 8x, DE = 3, and CE = x + 10, what is CD? Simplify your answer and write it as a proper fraction, mixed number, or integer.
Can you
Can you help me solve this math problem? I need to know the answer after multiplying 2 2/3 by 2 1/4 and then adding 1 2/3 divided by 1 4/5. Thank you in advance for your assistance.
Comparing by height
Ira is 1 2/5 m tall. Her mother is 4/5 m as tall as Ira. How many times is Ira's mother taller than her?
X intercept
Given: 3y+2x=-6 Calculate the X-intercept.
Bookshelf 3
How many 1/35-inch thick books can fit on a 1 4/12-inch long bookshelf?
The painter
Alex had 5/6 liter of white paint. He used 1/8 of it to paint the walls and 2/5 of the remaining to paint the fence. How much paint is left?
Solution mg/ml
If 70 ml of solution contains 280mg of drug, how many milligrams of drugs are in 50 ml of solution?
Fresh chickens
In the market, one stall is selling fresh chickens worth P120 per kilo. A person bought two fresh chickens weighing 1 1/2 and 1 1/4 kilos each. What is the total weight of the two chickens?
Library and gym
In a town, 7/8 of the population has a library card, and 3/4 has a gym membership. What fraction of the population has either a library card or a gym membership?
Convert 8
Convert 11/2 into a percent?
Eggs in basket
If the eggs in a basket are removed twice at a time, one will remain. Two eggs will remain if the eggs are removed three at a time. If the eggs are removed four, five, or six at a time, the three, four, and five eggs will remain, respectively. However, no
A piece 13
A piece of plank 2 1/2 cm thick is glued to another piece, which is 1 3/4 cm thick, to form a tabletop. Find the thickness of the tabletop if the glue used is 1/5 cm thick. primary school
A coin
Suppose you tossed a coin 12 times. The coin landed on heads 9 times and on tail 3 times. What is the probability of landing on tails?
The average 11
The average of a set of 7 numbers is 20. The average of a second set of 13 numbers is 40. What is the mean of all 20?

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