How many meaningful four-letter words can be formed from chosen letters of a word

This type of question, asked 4 times: 12 Sep 2025 S2, 13 Sep 2025 S3, 15 Sep 2025 S1, 16 Sep 2025 S1. All 4 questions below, oldest first.

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Question 1
12 Sep 2025 S2
9 $How many meaningful four-letter English words can be formed using the first, second, third, and sixth letters of the word "PROVIDE" (when counted from left to right), using each letter only once in each word?$
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Question 2
13 Sep 2025 S3
8 $How many meaningful four-letter English words can be formed using the first, second, third, and fifth letters of the word "SCHOOL" (when counted from left to right), using each letter only once in each word?$
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Question 3
15 Sep 2025 S1
8 $How many meaningful four-letter English words can be formed using the first, second, third, and fourth letters of the word "CAMERA" (when counted from left to right), using each letter only once in each word?$
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Question 4
16 Sep 2025 S1
10 $How many meaningful four-letter English words can be formed using the first, second, third, and fifth letters of the word "TRAVEL" (when counted from left to right), using each letter only once in each word?$
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Question 1