The document contains a series of numerical problems followed by their solutions. Each problem specifies a relationship or equation, with answers indicated next to them. The final statement expresses gratitude.

21. 1. 1:4
2. 3:1
3. 1:3
4. 1:2
5. 3:7
Answer:

23. 1. n = 2
2. n = 15
3. n = 10
4. n = 56
5. n = 36
Answer:

24. Thank you