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

Number of problems found: 121

Prime factors
Factor the number 6600 into the product of prime numbers.
Prime factors
Write 98 as a product of prime factors
Decomposition
Make decomposition using prime numbers of number 155. Result write as prime factors (all, even multiple)
John Smith
John Smith is reading a 435-page novel. If he reads the same number of pages per day and the number is a prime number greater than 10, how many pages per day will he read?
Lcm of three numbers
What is the Lcm of 120 15 and 5
Count of roots
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
Create the smallest possible number that is divisible by numbers 5,8,9,4,3
Divisible by nine
How many three-digit natural numbers in total are divisible without a remainder by the number 9?
Common divisors
Find all common divisors of numbers 30 and 45.
LCD 2
The least common denominator of 2/5, 1/2, and 3/4
Number
What number should be placed instead of the asterisk in number 702*8 to get a number divisible by 6?
LCM of two number
Find the smallest multiple of 63 and 147
Numbers
Determine the number of all positive integers less than 4183444 if each is divisible by 29, 7, 17. What is its sum?
What is 13
What is the number between 50 and 55 that is divisible by 2,3,6,9?
Plums
In the bowl are plums. How many would be there if we can divide it equally among 8, 10 and 11 children?
Decompose
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
What is the least common multiple of 5, 50, 14?
Counting number
What is the smallest counting number divisible by 2,5,7,8 and 15?
MO Z6-6-1
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?