The total number of whole numbers less than 500 that can be formed using the digits 1, 2, 4, and 5 without repetition is 40. ;
The total number of whole numbers less than 500 that can be formed using the digits 1, 2, 4, and 5 without repetition is 40. This count includes 4 one-digit numbers, 12 two-digit numbers, and 24 three-digit numbers. Therefore, 4 + 12 + 24 equals 40.
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