Reasoning
Q1 can't have A as its answer (otherwise it would contradict itself).
If Q1's answer was C (meaning Q4's answer was A), then Q3's answer would be C. However, Q2's answer should now be A, but this isn't allowed by Q1 (as Q4 is the first answer with A). This is a contradiction.
Therefore, Q1's answer is B (meaning Q3's answer is A).
For Q2's answer to be C, Q4's answer would have to be A, which would contradict Q4. Therefore, Q2's answer is B making Q4's answer B.
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Puzzle 6
Why are 2024 UK pound coins worth more than 2023 UK pound coins?
My first is in kendo, but not in squash.
My second is in hurdles, and in hunting.
My third is in bowman, and in bowling.
My fourth is in cycling, and in golf.
My fifth is in flying, and not in swimming.
My last is in running, and not in dancing.
My whole is a sport.
Reasoning
The 1st letter can only be: D E K N O
The 2nd letter can only be: H U
The 3rd letter can only be: B N O W
The 4th letter can only be: G L
The 5th letter can only be: F L Y
The 6th letter can only be: R U