Ten Digit Number
Create a 10-digit numbers using the digits 0 – 9 once and only once such that the first digit (leftmost digit) is divisible by 1, the first two digits (leftmost) are divisible by 2, the first three digits from the left are divisible by 3, and continue until the first 9 digits from left create a number divisible by 9 and the ten-digit number is divisible by 10.
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