# Natural numbers - 8th grade (13y) - math problems

#### Number of problems found: 157

- Unknown numbers

The sum of two consecutive natural numbers and their triple is 92. Find these numbers. - Big numbers

How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0 - AM of three numbers

The number 2010 can be written as the sum of 3 consecutive natural numbers. Determine the arithmetic mean of these numbers. - Three-digit

How many three-digit natural numbers do not have the number 7? - Count of roots

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

The sum of seven consecutive odd natural numbers is 119. Determine the smallest of them. - Three-digit integers

How many three-digit natural numbers exist that do not contain zero and are divisible by five? - Twenty-five

How many three-digit natural numbers are divisible by 25? - Rectangles

How many rectangles with area 8713 cm^{2}whose sides are natural numbers are? - Two numbers 7

The sum of two consecutive even numbers is 30. Find the numbers. - How many 4

How many 4 digit numbers that are divisible by 10 can be formed from the numbers 3, 5, 7, 8, 9, 0 such that no number repeats? - Telephone numbers

How many 7-digit telephone numbers can we put together so that each number consists of different digits? - Odd numbers

The sum of four consecutive odd numbers is 1048. Find those numbers ... - Three-digit numbers

We have digits 0,1,4,7 that cannot be repeated. How many three-digit numbers can we write from them? You can help by listing all the numbers. - Three numbers

We have three different non-zero digits. We will create all 3 digits numbers from them to use all 3 figures in each number. We add all the created numbers, and we get the sum of 1554. What were the numbers? - How many

How many double-digit numbers greater than 30 we can create from digits 0, 1, 2, 3, 4, 5? Numbers cannot be repeated in a two-digit number. - Unknown number 7

16% of the unknown number is by 21 less than unknown number itself. Determine the natural unknown number. - Even / odd numbers

a / Using variable n write two consecutive odd numbers. b / the sum of three consecutive odd numbers is 333. What are this numbers? - A three-digit numbers

Determine the total number of positive three-digit numbers that contain a digit 6. - Drawing from a hat

When drawing numbers from a hat from 1 to 35, we select random given numbers. What is the probability that the drawn numbers will be divisible by 8 and 2?

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