What is the sum of all the numbers from 1 to 100 that cannot be divisible by 5 or 9?

What is the sum of all the numbers from 1 to 100 that cannot be divisible by 5 or 9?

The sum is: 1 + 2 + +100 = 5050, the sum of the numbers divided by 5 is 5 × (1 + 2 +...) +20) The sum of the numbers divided by 9 is: 9 × (1 + 2 +...) 11) The sum of the numbers divisible by 45 is: 45 + 90 = 135, so all the numbers from 1 to 100 cannot be divisible by 5 and 9

How many numbers from 200 to 500 can be divided by 13 but not 17? And how many numbers from 100 to 999, such as 153 = 1 ^ 3 + 5 ^ 5 + 3 ^ 3?

There are 21 numbers from 200 to 500 that can be divisible by 13, but not by 17, such as 208, 234, 247, 260, 273, 286, 299, 312, 325, 338, 351, 364, 377, 390, 403, 416, 429, 455, 468, 481, 494. There are 4 numbers in the category of 153 = 1 ^ 3 + 5 ^ 3 + 3 ^ 3

The absolute value of rational number must be greater than 0______ ．

The absolute value of ∵ 0 is 0. 0 is neither positive nor negative. The absolute value of rational number must be bigger than 0