Divisibility + natural numbers - math problems
Number of problems found: 127
- Divisibility 2
How many divisors have integer number 13?
Determine all divisors of number 84.
- All pairs
Determine all pairs (m, n) of natural numbers for which is true: m s (n) = n s (m) = 70, where s (a) denotes the digit sum of the natural number a.
- Count of roots
How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
- Three-digit integers
How many three-digit natural numbers exist that do not contain zero and are divisible by five?
- Divisible by nine
How many three-digit natural numbers in total are divisible without a remainder by the number 9?
How many are three-digit natural numbers divisible by 25?
- Sum of the digits
How many are two-digit natural numbers that have the sum of the digits 9?
How many rectangles with area 8713 cm2 whose sides are natural numbers are?
- Digit sum
Find the smallest natural number n, the digit sum of which is equal to 37.
- Seven numbers
Write seven 4-digit numbers that are divisible by 3 and at the same time by 4.
- Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
- How many 4
How many 4 digit numbers that are divisible by 10 can be formed from the numbers 3, 5, 7, 8, 9, 0 such that no number repeats?
- 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,
Determine the smallest integer which divided 11 gives remainder 4 when divided 15 gives remainder 10 and when divided by 19 gives remainder 16.
- How many
How many numbers are less than 222 with a digit sum is 8?
- Odd numbers
The sum of four consecutive odd numbers is 1048. Find those numbers ...
- Primes 2
Which prime numbers is number 2025 divisible?
- Year 2018
The product of the three positive numbers is 2018. What are the numbers?
- Three digits number
From the numbers 1, 2, 3, 4, 5 create three-digit numbers that digits not repeat and number is divisible by 2. How many numbers are there?
Divisibility - math problems. Natural numbers - math problems.