Counting numbers in a given range formed from given digits

This type of question, asked 4 times: 11 May 2023 S1, 15 Apr 2026 S1, 16 Apr 2026 S1, 15 May 2026 S1. All 4 questions below, oldest first.

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Question 1
11 May 2023 S1
103 $How many numbers greater than a million can be formed with the digits 2, 3, 0, 3, 4, 2, 3?$
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Question 2
15 Apr 2026 S1
52 $2, 3, 5, 7, 9$
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Question 3
16 Apr 2026 S1
53 $The number of arrangements of the numbers strictly between 10 and 1000 formed with the digits 0, 1, 2, 3, 4, 5, 6 without repetition is$
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Question 4
15 May 2026 S1
55 $400$
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Question 1