There are 17 numbers between 300 and 400 that are divisible by three but not divisible by two. They are: 303, 309, 315, 321, 327, 333, 339, 345, 351, 357, 363, 369, 375, 381, 387, 393 and 399.
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In mathematics, the number of integers between 300 and 400 (inclusive) that are divisible by 3 can be calculated using the formula for the number of integers in an arithmetic sequence. The formula is ((last term - first term) / common difference) + 1. In this case, the first term is 300, the last term is 399, and the common difference is 3. Plugging these values into the formula, we get ((399 - 300) / 3) + 1 = 34. Therefore, there are 34 integers between 300 and 400 that are divisible by 3.
There are 22 numbers between 400 and 600 that are divisible by nine.
To find the number of integers between 400 and 800 that are divisible by 13, we first need to find the smallest and largest multiples of 13 within this range. The smallest multiple of 13 greater than or equal to 400 is 403, and the largest multiple less than or equal to 800 is 793. To find the count of numbers divisible by 13 in this range, we calculate (793-403)/13 + 1 = 31. Therefore, there are 31 numbers between 400 and 800 that are divisible by 13.
400 400 is 100 more than 300 and 100 less than 500. To find the halfway point (the average), add the two numbers and divide by 2.
There are nine that fall between 300 and 400: 310, 320, 330, 340, 350, 360, 370, 380, 390.