Turnout percent, invalid percent and the winner's share and margin given: total voters

The same question, asked 3 times: 24 Jul 2023 S2*, 17 Sep 2024 S2*, 23 Sep 2024 S2. Every wording below, oldest first.

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Question 1
24 Jul 2023 S2
73 $In an election between two candidates, 10% of the voters in the voter list did not cast their vote, whereas 10% of the votes cast were found to be invalid. The winning candidate got 56% of the valid votes and won the election by a margin of 1,458 votes. What is the total number of voters enrolled in the voter list?$
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Question 2
17 Sep 2024 S2
72 $Two candidates contested in an election. 80% of the voters cast their votes, out of which 5% of the polled votes were invalid. The winning candidate got 70% of valid votes and won by a majority of 36,480 votes. Find the total number of voters.$
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Question 3
23 Sep 2024 S2
75 $In an election between two candidates, P received 42% of the valid votes and Q won by 45,360 votes. 20% people did not cast their vote. If 10% of the votes cast were found invalid, what is the total number of votes registered in the poll booth?$
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Question 1