Here is a comprehensive set of 50 challenging rational number problems for your WordPress site. I have structured them into sections with Odia headings to match your theme.

Advanced Rational Numbers Practice – ପରିମେୟ ସଂଖ୍ୟା ଅଭ୍ୟାସ

1. Addition Challenge – ଯୋଗ (1-15)

1. $\frac{13}{17} + \frac{5}{34} = ?$
2. $5\frac{2}{3} + 8\frac{1}{4} = ?$
3. $\frac{7}{12} + \frac{5}{18} + \frac{1}{6} = ?$
4. $(-\frac{3}{5}) + \frac{11}{20} + (-\frac{1}{4}) = ?$
5. $\frac{19}{25} + \frac{7}{15} = ?$
6. $12\frac{1}{2} + 4\frac{3}{7} = ?$
7. $\frac{5}{9} + (-\frac{2}{3}) + \frac{4}{27} = ?$
8. $0.75 + \frac{1}{8} = ?$
9. $\frac{a}{b} + \frac{c}{d} = ?$
10. $\frac{11}{13} + \frac{2}{39} = ?$
11. $(-\frac{7}{8}) + (-\frac{5}{12}) = ?$
12. $\frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \frac{1}{5} = ?$
13. $6\frac{5}{9} + 3\frac{2}{15} = ?$
14. $\frac{22}{7} + \frac{3}{14} = ?$
15. $\frac{x}{2} + \frac{x}{3} = ?$

2. Subtraction Challenge – ବିୟୋଗ (16-25)

16. $\frac{15}{16} – \frac{7}{24} = ?$
17. $10\frac{1}{5} – 4\frac{2}{3} = ?$
18. $(\frac{5}{6} – \frac{1}{2}) – \frac{1}{3} = ?$
19. $(-\frac{11}{12}) – (-\frac{5}{8}) = ?$
20. $\frac{25}{27} – \frac{8}{9} = ?$
21. $7 – 3\frac{5}{11} = ?$
22. $\frac{100}{101} – \frac{1}{101} = ?$
23. $\frac{3x}{4} – \frac{x}{5} = ?$
24. $\frac{17}{20} – \frac{3}{15} – \frac{1}{10} = ?$
25. $0.5 – \frac{1}{3} = ?$

3. Multiplication Challenge – ଗୁଣନ (26-38)

26. $\frac{14}{15} \times \frac{25}{28} = ?$
27. $2\frac{1}{7} \times 3\frac{1}{2} = ?$
28. $(-\frac{9}{10}) \times \frac{5}{12} \times (-\frac{4}{3}) = ?$
29. $\frac{121}{144} \times \frac{12}{11} = ?$
30. $\frac{3}{4} \times \frac{4}{5} \times \frac{5}{6} \times \frac{6}{7} = ?$
31. $0.6 \times \frac{5}{9} = ?$
32. $(-\frac{13}{25}) \times (-\frac{5}{26}) = ?$
33. $\frac{p}{q} \times \frac{q}{p} = ?$
34. $5\frac{5}{8} \times \frac{16}{45} = ?$
35. $\frac{7}{11} \times 0 = ?$
36. $\frac{18}{19} \times \frac{19}{18} = ?$
37. $(\frac{1}{2} \times \frac{2}{3}) \times \frac{3}{4} = ?$
38. $\frac{2x}{3} \times \frac{9}{4x} = ?$

4. Division Challenge – ଭାଗ (39-50)

39. $\frac{21}{25} \div \frac{7}{10} = ?$
40. $6\frac{2}{3} \div 1\frac{1}{9} = ?$
41. $\frac{(-\frac{15}{16})}{\frac{5}{8}} = ?$
42. $\frac{1}{2} \div \frac{1}{3} \div \frac{1}{4} = ?$
43. $10 \div \frac{2}{5} = ?$
44. $\frac{11}{12} \div (-\frac{11}{12}) = ?$
45. $0.75 \div \frac{3}{4} = ?$
46. $\frac{x^2}{y} \div \frac{x}{y^2} = ?$
47. $5\frac{1}{4} \div 7 = ?$
48. $\frac{2}{3} \div \frac{4}{9} \times \frac{1}{2} = ?$
49. $\frac{1}{\frac{1}{2}} = ?$
50. $\frac{\frac{3}{4} + \frac{1}{4}}{\frac{1}{2} \times 2} = ?$