Assuming you refer to positive integers, the answer is 10:9
It is 0 since the number of odd numbers less than 180 is infinite and a finite number "divided by infinity" is zero. However, if you limit yourself to positive integers, then the ratio is 49/90, which cannot be simplified.
ratio
The ratio is 1:2. For every even number there are 2 odd numbers. Fibonacci Series: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... which is even, odd, odd, even, odd, odd, even, odd, odd, even, ... the pattern continues
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.)
If you restrict yourself to natural numbers, it is 25/25 = 1/1.
It is 0 since the number of odd numbers less than 180 is infinite and a finite number "divided by infinity" is zero. However, if you limit yourself to positive integers, then the ratio is 49/90, which cannot be simplified.
ratio
The ratio of odd numbers to even numbers is 1 : 1 or 50-50.
Odd. First subtract 1 less than your odd number, (which is obviously even) to get even - even, which is even. Then take off your spare 1 to finish up odd.
The ratio is 1:2. For every even number there are 2 odd numbers. Fibonacci Series: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... which is even, odd, odd, even, odd, odd, even, odd, odd, even, ... the pattern continues
The sum of the 25 primes less than 100 is even (it is 1060).The first prime number is 2. Every other prime number is odd.So, of the 25 primes less than 100, one is even and 24 are odd.Any two odd numbers sum to an even number. Therefore, an even number of odd numbers has an even sum. So the sum of 24 odd numbers is even.Therefore, the sum of the 25 primes less than 100 is even.
The set of positive odd integers.
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.)
If you restrict yourself to natural numbers, it is 25/25 = 1/1.
None. All counting numbers are even or odd.
There are four odd numbers less that 100 that have 6 factor. This does not compare with even numbers that have 12 factors!
if the numbers are from 1 - 9 then the ratio of even to odd is 4:5 (2, 4, 6 & 8 are even, 1, 3, 5, 7 & 9 are odd)