Multiplication + natural numbers - examples
One brick is 4 kg and half a brick heavy. What is the weight of one brick?
Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates?
We know little about this Greek mathematician from Alexandria, except that he lived around 3rd century A.D. Thanks to an admirer of his, who described his life by means of an algebraic riddle, we know at least something about his life. Diophantus's youth l
- No. of divisors
How many different divisors has number ??
After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
Determine the number of all positive integers less than 2937474 if each is divisible by 11, 23, 17. What is its sum?
How many steps you save if you go square estate for diagonal (crosswise), rather than circumvent on the two sides of its perimeter with 298 steps.
21 weeks is equal to how many days?
In the camp are children. 1/4 went on a trip, 1/2 went to bathe and 99 children remained in the room. How many children are in camp?
How many times should be broken chocolate consisting of 7 × 10 pieces to get the 70 parts?
How many ways are there to arrange 9 books on a shelf?
In the market have 3 kinds of chocolates. How many ways can we buy 13 chocolates?
What is the least common multiple of 28, 42, 22?
- Pension or fraud
Imagine that your entire working life working honestly and pay taxes and to Social Insurance (in Slovakia). You have a gross wage 910 Euros, you pay social insurance (you and your employer) monthly € 319 during 43 years and your retirement is 410 Eur.
How many ways can divide 22 identical candies to 4 children?
Determine the smallest integer which divided 8 gives remainder 6 when divided 19 gives remainder 9 and when divided by 11 gives remainder 2.
- Bus driver
The bus driver rides 191 km in the morning, afternoon rides 22 km more. How many kilometers traveled in 5 days if he rides on the same line?
- Count of roots
How many solutions has equation x. y = 2531 with two unknowns on the set of natural numbers?
- Three digits number
How many are three-digit integers such that in they no digit repeats?
Find all divisors of number 418. How many are them?