Prime numbers + divisibility - math problems

Number of problems found: 130

  • Primes 2
    prime_table Which prime numbers is number 2025 divisible?
  • Decomposition
    prime_factorization Make decomposition using prime numbers of number 155. Result write as prime factors (all, even multiple)
  • Prime divisors
    plusminus_1 Find 2/3 of the ratio of the sum and the product of all prime divisors of the number 120.
  • Prime factors
    prime Write 98 as product of prime factors
  • Prime number
    prime_2 Jan wrote any number from 1 to 20. What is the probability that he wrote the prime number?
  • Six-digit primes
    numberline_1 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?
  • Year 2018
    new_year The product of the three positive numbers is 2018. What are the numbers?
  • Amazing number
    numbers4 An amazing number is name for such even number, the decomposition product of prime numbers has exactly three not necessarily different factors and the sum of all its divisors is equal to twice that number. Find all amazing numbers.
  • Unknown number
    unknown Unknown number is divisible by exactly three different primes. When we compare these primes in ascending order, the following applies: • Difference first and second prime number is half the difference between the third and second prime numbers. • The prod
  • Common divisors
    prime Find all common divisors of numbers 30 and 45.
  • Divisibility
    dots Determine the smallest integer which divided 11 gives remainder 4 when divided 15 gives remainder 10 and when divided by 19 gives remainder 16.
  • Numbers
    primes Write smallest three-digit number, which in division 5 and 7 gives the rest 2.
  • Twenty-five
    prime How many three-digit natural numbers are divisible by 25?
  • Lcm 2
    lcm Create the smallest possible number that is divisible by numbers 5,8,9,4,3
  • Count of roots
    eggs How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
  • Divisible by nine
    numbers_2 How many three-digit natural numbers in total are divisible without a remainder by the number 9?
  • LCM of two number
    numbers2_19 Find the smallest multiple of 63 and 147
  • Diofant 2
    1diofantos Is equation ? solvable on the set of integers Z?
  • No. of divisors
    triangle_div How many different divisors have number ??
  • Rectangles
    rectangles How many rectangles with area 8713 cm2 whose sides are natural numbers are?

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Prime numbers - math word problems. Divisibility - math word problems.