Prime numbers - 6th grade (11y) - math problems

Number of problems found: 117

  • Prime factors
    prime Factor the number 6600 into the product of prime numbers.
  • Prime factors
    prime Write 98 as product of prime factors
  • Decomposition
    prime_factorization Make decomposition using prime numbers of number 155. Result write as prime factors (all, even multiple)
  • Lcm of three numbers
    prime What is the Lcm of 120 15 and 5
  • Count of roots
    eggs How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers?
  • Fractions
    cmp_fractions Sort fractions ? by its size. Result write as three serial numbers 1,2,3.
  • Lcm 2
    lcm Create the smallest possible number that is divisible by numbers 5,8,9,4,3
  • Divisible by nine
    numbers_2 How many three-digit natural numbers in total are divisible without a remainder by the number 9?
  • Common divisors
    prime Find all common divisors of numbers 30 and 45.
  • LCD 2
    zlomky_6 The least common denominator of 2/5, 1/2, and 3/4
  • Number
    prime What number should be placed instead of the asterisk in number 702*8 to get a number divisible by 6?
  • Numbers
    ten Determine the number of all positive integers less than 4183444 if each is divisible by 29, 7, 17. What is its sum?
  • LCM of two number
    numbers2_19 Find the smallest multiple of 63 and 147
  • What is 13
    numbers_5 What is the number in between 50 and 55 that is divisible by 2,3,6,9?
  • Plums
    svestka In the bowl are plums. How many would be there if we can divide it equally among 8, 10 and 11 children?
  • Decompose
    cinema_5 Decompose into primes and find the smallest common multiple n of (16,20) and the largest common divisor D of the pair of numbers (140,100)
  • LCM
    calc_icon What is the least common multiple of 5, 50, 14?
  • Counting number
    numbers2_49 What is the smallest counting number divisible by 2,5,7,8 and 15?
  • MO Z6-6-1
    kruhy_1 Write integers greater than 1 to the blanks in the following figure, so that each darker box was product of the numbers in the neighboring lighter boxes. What number is in the middle box?
  • School
    ratios_2 Headteacher think whether the distribution of pupils in race in groups of 4,5,6,9 or 10. How many pupils must have at least school at possible options?

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Prime numbers - math word problems. Examples for 6th grade (the sixth graders).