To find the number of three-digit positive integers with digits whose product is 24, we can break down 24 into its prime factors: 2 x 2 x 2 x 3. The possible combinations for the three digits are (2, 2, 6), (2, 3, 4), and (2, 4, 3). These can be arranged in 3! ways each, giving a total of 3 x 3! = 18 three-digit positive integers.
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Three of them.
50%
There are 20.
A bijective numeration is a numeral system which uses digits to establish a bijection between finite strings and the positive integers.
20. 16 without repeating a digit.