157 of them.
500
40 palindromes.
They are from 11 squared to 22 squared making a total of 12 square numbers between 100 and 500
If you mean 3-digit numbers whose digits are in decreasing order, then the answer is 20.
157 of them.
500
40 palindromes.
There are (500-100)/2 = 200 numbers divisible by 2 between 100 and 500 counting 100 but not 500. Of these (500-100)/8 = 50 are divisible by 8. So there are 150 numbers between 100 and 500 divisible by two but not by 8. By relative primeness exactly 50 out of these 150 are divisible by 3 and therefore these 50 are exactly the ones divisible by 6 but not by 8.
They are from 11 squared to 22 squared making a total of 12 square numbers between 100 and 500
If you mean 3-digit numbers whose digits are in decreasing order, then the answer is 20.
500
There are 156 such numbers.
100 times because if you do the opposite with the numbers you have, 500/5=100
There are 67 numbers between 100 and 500 divisible by 6. The first number greater than 100 divisible by 6: 100 ÷ 6 = 16 r 4 → first number divisible by 6 is 6 × 17 = 102 Last number less than 500 divisible by 6: 500 ÷ 6 = 83 r 2 → last number divisible by 6 is 6 × 83 = 498 → all multiples of 6 between 17 × 6 and 83 × 6 inclusive are the numbers between 100 and 500 that are divisible by 6. → there are 83 - 17 + 1 = 67 such numbers.
The 3 digit numbers under 500 are 100 through 499.
square numbers between 1 and 500 There are 22 square numbers between 1 and 500 here they are 1, 4,9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400, 441, 484.