Problems IYNT 2023
1. Chemical countdown
2. Knots
3. Chirping sounds
4. Colorful lines
5. Dark side of the Moon
6. Buzzing ribbons
7. Stormglass
8. Shower head
9. Flowers and ammonia
10. Ferments
11. Soot mirror
12. Jumps
13. Non-Newtonian fluids
14. Proxy variables
15. Genetics
16. Boiling salt solutions
17. Elastic balls
21. Human hair
22. Ice cubes
23. Runner
24. Laser lines
25. Yellow flowers
26. Invisible ink