# Prime numbers - 7th grade (12y) - math problems

#### Number of problems found: 136

- Prime factors

Factor the number 6600 into the product of prime numbers. - Decomposition

Make decomposition using prime numbers of number 155. Result write as prime factors (all, even multiple) - Prime factors

Write 98 as product of prime factors - Prime divisors

Find 2/3 of the ratio of the sum and the product of all prime divisors of the number 120. - Raffle

In the pool is numbers from 1 to 115. What is the probability that a randomly selected number is not a prime number? - Common divisors

Find all common divisors of numbers 30 and 45. - Lcm of three numbers

What is the Lcm of 120 15 and 5 - Twenty-five

How many three-digit natural numbers are divisible by 25? - Count of roots

How many solutions has equation x. y = 7757 with two unknowns on the set of natural numbers? - Divisible by nine

How many three-digit natural numbers in total are divisible without a remainder by the number 9? - Rectangles

How many rectangles with area 8713 cm^{2}whose sides are natural numbers are? - Summands

Find two summands of the number 42, so that its product is minimized. - No. of divisors

How many different divisors have number ?? - LCM

What is the least common multiple of 5, 50, 14? - Number

What number should be placed instead of the asterisk in number 702*8 to get a number divisible by 6? - Four-digit number

Find also a four-digit number, which quadrupled written backwards is the same number. - Lcm simple

Find least common multiple of this two numbers: 140 175. - Counting number

What is the smallest counting number divisible by 2,5,7,8 and 15? - Flowerbeds

What is the smallest length of flowerbeds we have to prepare to plant seedlings at grid 20,30,25,40 cm? - Plums

In the bowl are plums. How many would be there if we can divide it equally among 8, 10 and 11 children?

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Prime numbers - math word problems. Examples for 7th grade (seventh).