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You can calculate that as follows: 85 - 15 - 1. If you want to include both endpoints (greater or equal to 15, less than or equal to 85), the calculation becomes 85 - 15 + 1. You can verify that this is correct, using smaller numbers - for example, "how many numbers are between 1 and 5".
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How many counting numbers less than 30 are composite but neither odd nor even?
None. All counting numbers are even or odd.
Are integers counting numbers?
No- not exactly. Negative integers are not counting numbers. Positive integers are identified with counting numbers. Many authors like to start with zero as a counting number.
How many counting numbers less than 30 are either odd or even but not both?
All numbers are either odd or even, none are both, so less than 30 there are 29 counting numbers that are either odd or even but not both. (Assuming you mean starting to count with 1.)
How many odd numbers are greater than 6 less than 19?
Six
How many composite numbers are greater than forty but less than fifty?
Five.
How many counting numbers less then 30 are composite but nei ther odd or even?
None of them. All counting numbers are either odd or even.
How many counting numbers less than 30 are composite but neither odd nor even?
None. All counting numbers are even or odd.
How many counting numbers less than 1000 are not evenly divisible by 7?
858
How many prime numbers are there that are greater then 80 but less then 100?
The prime numbers that are greater than 80 and less than 100 are 83, 89, and 97.
How many numbers are greater than 76 but less than 89?
Twelve numbers exactly are greater than 76 and less than 89.
How many counting numbers less than 300 are divisible by both three and seven?
14 of them.
How many composite numbers are greater then 20 but less then 25?
3 composite numbers, 21, 22, and 24, are greater than 20 but less than 25.
How many composite numbers are greater than 50 but less than 70?
There are 15 composite numbers greater than 50 but less than 70
How many counting numbers are less than 3 units from the number 4?
it's 5
How many two-digit counting numbers are greater than 70 or a multiple of ten?
- There are an infinite number of "counting numbers" that are greater than 70. - There are also an infinite number of "counting number" that are multiples of 10. So.... since you used an "OR" statement, this mean how many number are true for both statements above. That would be: AN INFINITE NUMBER of counting numbers. In fact, if you had said "AND", it still would be an infinite number: 80, 90, 100, ... and so on FOREVER. * * * * * The above answer has interpreted the questions as "two-digit counting numbers greater than 70" OR "a multiple of ten". Apart from the fact that there are not an infinite number of two-digit counting numbers greater than 70, the answer would be correct. But the answer could be interpreted as "two digit counting numbers" that are "greater than 70" OR "a multiple of ten". In that case, the first set is {71, 72, ... 99} and the second is {10, 20, 30, ... 90} with an intersection set consisting of {80 and 90} So there are 29 + 9 - 2 = 36 such number.
How many numbers greater than 0 but less than 500?
Infinitely many.
Are integers counting numbers?
No- not exactly. Negative integers are not counting numbers. Positive integers are identified with counting numbers. Many authors like to start with zero as a counting number.
