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 cm2 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).