Natural numbers + multiplication - math problems

Number of problems found: 90

  • Three-digit
    seven How many three-digit natural numbers do not have the number 7?
  • Big numbers
    numbers_1 How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0
  • Digits
    numbers2_18 How many natural numbers greater than 4000 which are formed from the numbers 0,1,3,7,9 with the figures not repeated, B) How many will the number of natural numbers less than 4000 and the numbers can be repeated?
  • Twenty-five
    prime How many three-digit natural numbers are divisible by 25?
  • Three-digit
    numbers_5 How many three-digit natural numbers is greater than 321 if no digit in number repeated?
  • Three-digit integers
    numbers2_49 How many three-digit natural numbers exist that do not contain zero and are divisible by five?
  • Count of roots
    eggs How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
  • Number 4
    numbers_3 Kamila wrote all natural numbers from 1 to 400 inclusive. How many times did she write the number 4?
  • Rectangles
    rectangles How many rectangles with area 8713 cm2 whose sides are natural numbers are?
  • Dd 2-digit numbers
    numbers_49 Find all odd 2-digit natural numbers compiled from digits 1; 3; 4; 6; 8 if the digits are not repeated.
  • Prime factors
    prime Factor the number 6600 into the product of prime numbers.
  • Theorem prove
    thales_1 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?
  • A three-digit numbers
    clocks_1 Determine the total number of positive three-digit numbers that contain a digit 6.
  • Telephone numbers
    phones How many 7-digit telephone numbers can we put together so that each number consists of different digits?
  • Written number
    numbers2_49 Place+values x ten thousands =30 thousands
  • Progression
    sequence_geo_10 -12, 60, -300,1500 need next 2 numbers of pattern
  • Weeks
    calendar 38 weeks is equal to how many days?
  • Quotient
    kohut Determine the quotient (q) and the remainder (r) from division numbers 100 and 8. Take the test of correctness.
  • Expression
    numbers If A=2 B=3 evaluate expression A(B+A) and multiply it by A
  • Lcm 2
    lcm Create the smallest possible number that is divisible by numbers 5,8,9,4,3

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