Prime numbers + reason - math problems
Number of examples found: 74
- Diofant equation
250x + 120y = 5640
The sum of all divisors unknown odd number is 2112. Determine sum of all divisors of number which is twice of unknown numbers.
- Year 2018
The product of the three positive numbers is 2018. What are the numbers?
Find two summands of the number 42, so that its product is minimized.
- Four-digit number
Find also a four-digit number, which quadrupled written backwards is the same number.
What number should be placed instead of the asterisk in number 702*8 to get a number divisible by 6?
- 7 digit number
If 3c54d10 is divisible by 330, what is the sum of c and d?
- Six-digit primes
Find all six-digit prime numbers that contain each one of digits 1,2,4,5,7 and 8 just once. How many are they?
- Unknown integer
Find the smallest integer that: divided by 2, the remainder is 1 divided by 3 the remainder is 2, divided by 4 remainder is 3, ... divided by eight reminder is 7, by 9 reminder is 8.
How many three-digit natural numbers are divisible by 25?
- 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 ∗ ∗
Five bus lines runs at intervals 3, 6, 9, 12, 15 minutes. In the morning, suddenly start at 4:00. After how many minutes the bus lines meet again?
How many different rectangles can be made from 60 square tiles of 1 m square? Find the dimensions of these rectangles.
- The King
The King wants to divide his sons equally. He has 42 rubies and 45 diamonds. How many sons and how will they share them?
I have a box of chocolate - white, milk and dark. The ratio of white to milk with dark is 3: 4. The ratio of white and milk to dark is 17: 4. Calculate what is the ratio between white, milk, dark chocolate.
- Dance group
The dance group formed groups of 4, 5, and 6 members. Always one dancer remains. How many dancers were there in the whole group?
- Reminder and quotient
There are given the number C = 281, D = 201. Find the highest natural number S so that the C:S, D:S are with the remainder of 1,
- Divisibility by 12
Replace the letters A and B by digits so that the resulting number x is divisible by twelve /find all options/. x = 2A3B How many are the overall solutions?
Florist has 84 red and 48 white roses. How many same bouquets can he make from them if he must use all roses?
How many tiles of 20 cm and 30 cm can build a square if we have a maximum 100 tiles?