Math practice for 13 year olds - page 171 of 413
Number of problems found: 8260
- Apartment building
Two hundred eight people live in the apartment building. There are as many women as there are men, but there are 22 more children than women. How many adults live in an apartment building? - Pilgrimage spending
Paul spent CZK 315 on a pilgrimage over three days, doubling his spending each day. How much did he spend on the first day? - Bank interest comparison
Father put €600 in a bank that pays government interest at a rate of 3%p. A. Grandfather put €610 in a bank that will make governments at a rate of 2%p. A. Which will have more money if they withdraw from the bank after one year? - ABC isosceles
ABC isosceles rights triangle the length of each leg is 1 unit what is the length of the hypotenuse AB in the exact form - Machine efficiency loss
What percentage is the loss of a machine that works with an efficiency of 0.78? - Engine performance
The car's engine develops a power of 1800 N. Find its performance if it travels evenly on a horizontal path at 48 km/h. - Sphere surface
The volume of the sphere is 803.84 m³. Calculate its surface. - Five-digit number
Anna thinks of a five-digit number not divisible by three or four. If he increments each digit by one, it gets a five-digit number divisible by three. If he reduces each digit by one, he gets a five-digit number divisible by four. If it swaps any two digi - Cage gravitational energy
Find the potential gravitational energy of a 2000 kg tow cage relative to the bottom of an 850 m deep draw pit when the cage is on the surface. - G Force, mass A car with a weight of 20 kN travels at a speed of 54 km/h. What is its kinetic energy?
- Nail work
What work do we do if we pull out a 58 mm nail with an average force of 350 N? - Happy marriage
Jan and Mary have been in a happy marriage for several years. Jan's age is written in the same numbers as Mary's, only in reverse order. Their ages differ by just a fifth of Mary's. Jan is older. How old is Jan, and how many is Mary? - Miguel
Miguel and Kat are reading the same book. Miguel reads the book three times as many pages as Kat. Together, they read 48 pages. Write an equation that we can use to find how many pages Kat read. - She showed the PC
Sabína wrote down how many hours a day she sat at the PC. Dana illustrated the data using a radar chart. Sabína spent approximately 100% more time at the PC on weekends than on weekdays. Saturday: 5 hours, Sunday: 4 hours. During the week: Monday 1 hour, - Giraffe 2
The lifespan of a guinea pig is six years less than that of a giraffe. The lifespan of a tiger is four times that of a guinea pig. If the total lifespan of the three animals is 30 years, calculate the lifespan of the giraffe. - Jordan
Jordan wants to bring in cookie cakes to share with his 23 classmates for his birthday. His mom is willing to buy up to six cookie cakes, and Jordan must share the cakes equally with his classmates (and himself). Answer the questions to help Jordan decide - Carla 2
Carla is renting a canoe. It costs $80 for 2 hours and $110 for 4 hours. What is the rate of change for this situation? - Which 3
Which is an equivalent ratio of 12:36 - Pedestrian cyclist meeting
Cities A and B are 36 km apart. A pedestrian leaves town A at a speed of 6 km/h to place B. A cyclist leaves town B simultaneously at a speed of 24 km/h to town A. In how many hours and at what distance will they meet? Write the result in minutes. - Roll of wallpaper
An art student uses a roll of wallpaper to decorate two gift boxes. The student will use 3 1/3 yards of paper for one box and 5/6 yards of paper for the other box. He must cut the paper into pieces that are 1/6 yard long. How many pieces will the student
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