Geometric series dividing by 5 (625, 125, 25, 5 ...)

The same question, asked 2 times: 24 Sep 2025 S2*, 26 Sep 2025 S2. Every wording below, oldest first.

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Question 1
24 Sep 2025 S2
17 $What should come at the place of question mark? : 625, 125, 25, 5, ?, ?$
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Question 2
26 Sep 2025 S2
15 $What is the next number in the series? 625, 125, 25, ___$
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