Natural numbers + time - practice problems
Number of problems found: 116
- Library 4
Library A has a total collection of 250 books. Library B has 100 more books than Library A, and Library C has twice as many books as the combined number of books in Library A and B. What is the total number of books in libraries A, B and C? - Fransisca
Fransisca read a book 391 pages long, reading 17 pages a day. There are two more books in the series. How long will it take Fransisca to read all three books if they have the same page length and she reads at the same speed? - Ronald 2
Ronald and Tim both did their laundry today. Ronald does laundry every 6 days, and Tim does laundry every 9 days. How many days will it be until Ronald and Tim both do laundry on the same day? - Hans spent
Hans spent three days baking 224 cookies. On the second day, he baked twice as many as he did on the first day. On the third day, he baked half as many as he did on the first day. Which equation represents the situation if x is the number of cookies Hans - Planetary system
Robert has built a mechanical model solar system with three balls representing planets at the end of rods. Each rod is attached to the center, representing the Sun. The planets are lined up when he turns on the motor. The innermost planet makes a revoluti - Human population
The populations of two cities after t years can be modeled by -150t+50,000 and 50t+75,000 . What is the difference in the populations of the cities when t=4? - Numbers 4328
What is the sum of the numbers in 2006? - Benjamin 7254
The sum of the years of Simona, Karel, and Benjamin is 54. What will be the sum of their years by seven years? - Monica 3
Monica works on her drawings for 2 hours. She spends 1/6 hour on each drawing. How many drawings does she work on in 2 hours? - Hundred 7239
Each of the six horses ate just 75 days in a hundred days. How many and at least days could be during which at least five horses ate? - Workshop
The workshop has to be produced for 5 days 2000 components. How many components must be produced in the workshop daily, and how much per hour if the shift is 8 hours? - Schoolyard 79854
The children ran the school relay four times around the schoolyard. The shortest measured time was 2 minutes, and the longest was 3 minutes. In what was the longest and shortest time could the relay run around the yard? - Population 2909
The world's population is growing by 94,867,200 each year. How much is it a) month, b) day, c) hour, d) minute? - 5 2/5
5 2/5 hours a week mathematics, 3 3/4 hours a week Natural sciences, 4 3/8 hours a week Technology. How many hours does he spend on social sciences if he spends 17 1/2 hours a week on the four subjects? - Aristotle 27401
Aristotle was born in 384 BC and lived to be 62 years old. In what year did he die? Plato lived to be 81 and died in 348 BC. What year was he born? - Calculate: 80736
Gaius Julius Caesar was born in 100 BC. He was murdered when he was 56 years old. Calculate: a) in what year was he murdered? b) How many years ago was he born? c) How many years ago did he die? - Already 34231
Every time it is Friday, Mom takes five apples. Friday has already taken place 18 times. How many apples does my mom have if she always ate only 1? - Tablets 80294
Pepík is sick and has to take 1 tablet three times a day. How many days will a pack of 30 tablets last him if he only takes 1 tablet in the morning and evening every third day? - Millie
Millie has three sisters. Each sister reads two pages every morning and four pages every evening. Which expression can be used to represent the total number of pages read by Millie's sisters after five days? - Monkey
The monkey fell into 20 meters deep well. Every day it climbs 3 meters, at night it drops back by 2 m. On what day it gets out from the well?
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