Multiplication + natural numbers - examples
- Z7-I-4 stars 4949
Write instead of stars digits so the next write of product of the two numbers to be valid: ∗ ∗ ∗ · ∗ ∗ ∗ ∗ ∗ ∗ ∗ 4 9 4 9 ∗ ∗ ∗ ∗ ∗ ∗ 4 ∗ ∗
Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates?
One brick is 2 kg and half a brick heavy. What is the weight of one brick?
55 weeks is equal to how many days?
After check of textbooks found that every 8-th textbook should be withdrawn. Together 74 textbooks were withdrawn. How many textbooks were in stock before withdrawn and how many after withdrawn?
How many ways are there to arrange 9 books on a shelf?
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?
What is the least common multiple of 28, 42, 22?
How many times should be broken chocolate consisting of 5 × 6 pieces to get the 30 parts?
In the market have 3 kinds of chocolates. How many ways can we buy 13 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
- 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?
How many ways can divide 22 identical candies to 4 children?
- Three digits number
How many are three-digit integers such that in they no digit repeats?
- No. of divisors
How many different divisors has number ??
Determine the quotient and the remainder from division numbers 1965 and 49. Take the test of correctness.
Find all divisors of number 418. How many are them?
- 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.
The sum and the product of three integers is 6. Write largest of them.
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.