There are 450 even three-digit integers, from 100 to 998.
This excludes numbers with leading zeroes (000 to 099).
100
None. 3 digit numbers are not divisible by 19 digit numbers.
998
More than one
For the first digit there would be 4 options For the second digit there would be 3 options for the third digit there would be 2 options Thus 4*3*2 = 24 three digit numbers can be formed if each digit can only be used once in a 3 digit number made.
100
999 What is even odd? 3 digit odd numbers 101,103,105...999 so count them = 450 3 digit even numbers 100,102,104...998 so count them = 450
None. 3 digit numbers are not divisible by 19 digit numbers.
Yes. By 1 digit, 2 digit and some even by other 3 digit numbers.
Zero.
998
There are 151 3-digit numbers that are divisible by 6.
More than one
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.
24 of them. So we have a 2 or 6 in the unit position, therefore (2)(4)(3) = 24 even three-digit numbers, can be formed.
There are 84 such numbers.
The 3 digit numbers under 500 are 100 through 499.