450
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450
450 whole numbers.
Well, honey, the digit 3 appears in every odd number that ends in 3, 13, 23, 33, and so on up to 39. So, in the first 40 odd numbers, the digit 3 appears 4 times. Math doesn't have to be a drag, darling!
No. Any number that ends in 1, 3, 5, 7 or 9 (odd single-digit numbers) are odd numbers. Numbers that end in 2, 4, 6, 8 or 0 (even single digit numbers) are considered even numbers. 653 ends in 3, which is an odd #, so it is considered odd, not even.
There are 10 3-digit odd palindromes that are divisible by five.