Easily put any number with a single odd number 1,3,5,7,9 in a three digit number. Like 113 the 3 and 1 makes it odd number or 223 the three makes it odd.
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There are 17 such numbers.
1, 3, and 5.
874
3897
There are 899 three digit numbers (100 through 999).Each century (grouping of 100 numbers) has 50 odd numbers. (half of the numbers are odd, half are even)So.. 100-199, 200-299, 300-399, 400-499, 500-599, 600-699, 700-799, 800-899, 900-999We have 9 centuries.Number of odd numbers = 9*50 = 450