There are three numbers between 10 and 50 which are divisible by both 3 and 5. All numbers that are multiples of 3 and 5 are the multiples of the lowest common multiples (lcm) of 3 and 5 which is 15. The multiples of 15 between 10 and 50 are {15, 30 and 45}, thus there are 3 numbers.
There are 33 multiples of 3 in the range. as first and last are both odd there must be 17 odd and 16 even. Also note that such numbers must be multiples of 6 and 16 x 6 = 96
The 3-digit counting numbers are 100 through 999 = 900 numbers.Half them are multiples of 2 (even numbers).The other half are not . . . 450 of them.
Four. 24 and its multiples.
All the multiples of 4 are also multiples of 2.
9 of them.
16 of them.
There are 30 multiples of 30 between 100 and 999.
1003 even numbers minus 143 multiples of 14 equals 860
There are 16 numbers from 1 to 101 that are divisible by 3 and are even.
There are 5 multiples of 18 between 200 and 300. (An even number divisible by 9 is any number divisible by 18).
There are three numbers between 10 and 50 which are divisible by both 3 and 5. All numbers that are multiples of 3 and 5 are the multiples of the lowest common multiples (lcm) of 3 and 5 which is 15. The multiples of 15 between 10 and 50 are {15, 30 and 45}, thus there are 3 numbers.
There are 898 three-digit even numbers. Nine of them are multiples of 55. That leaves 889 * * * * * There are 450 three-digit even numbers and 17 of them are multiples of 55. So that leaves 433.
There are 33 multiples of 3 in the range. as first and last are both odd there must be 17 odd and 16 even. Also note that such numbers must be multiples of 6 and 16 x 6 = 96
There are 83 composite numbers.
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
Just count the multiples of 6...