So, finished this exercise, but I was a little unsure as to what
exactly constituted a mixed conditional.
Also, I seem to have answered a disproportionate amount of the answers 'Second Conditionals'. I think I have over-represented this conditional! Feedback is greatly appreciated

Matt
1. If I knew where he lived, I’d visit him. 1- Zero
2. If you heat water to 100° Celsius, it boils. 2- Zero
3. If I hadn’t picked up Martin’s wallet, he would be in dire straits now. 3- Third
4. If you go out alone at night, you will get into trouble. 4- First
5. If you had studied Spanish last year, you would have been fluent by now. 5- Second
6. If I eat chocolate all the time, I get fat. 6- Zero
7. If I were you, I’d buy the red dress. 7- Second
8. What would you have done, if your girlfriend told you she had got a new boyfriend? 8- Mixed
9. If she had looked where she was going, she wouldn’t have had an accident. 9- Third
10. If you come to the party tonight, you’ll meet Tom. 10- First
11. If you build it, he will come. 11- Zero
12. If I were you, I wouldn’t touch that. 12- Second
13. If you stroke cats, they purr. 13- Zero
14. If James wanted to go to Iceland, he would have booked a flight by now. 14- Mixed
15. If you spank children, they cry. 15- Zero
16. If only you had continued playing the piano, you would be an amazing player by now. 16- Third
17. If you are nice to people, they are nice back. 17- First
18. If I spoke nicely to you, would you talk to me? 18- Second
19. We’ll go to the cinema, if the weather’s bad. 19- Second
20. If I won a million pounds, I’d pay off my debts and go on holiday. 20- Second
21. Had I had more courage, I would have tried to speak to the beautiful girl. 21- Mixed
22. If Martin comes, we’ll pretend we’re not here. 22- Second
23. What would you do, if you suddenly became blind? 23- Second
24. If I had had more energy, I would have finished the race. 24- Mixed
25. I would own my own house today, if I hadn’t foolishly given the other one away. 25- Third