Four
17 19 21 23
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There are five odd numbers between 15 and 24. This can be calculated by determining the total numbers in the range (24-15+1=10) and then dividing by 2 to find the number of odd numbers, since every other number is odd. So, 10/2 = 5 odd numbers.
25
51
61
They are: 17 19 and 23
Well, let's take a moment to appreciate the beauty of numbers. The factors of 15 are 1, 3, 5, and 15. And the factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24. Isn't it wonderful how numbers can be broken down into smaller parts that work together harmoniously?