Reasoning

Riya is 9th from top in a class of 12. Rank from bottom?

Riya is 16th from top in a class of 30. Rank from bottom?

Riya is 4th from top in a class of 30. Rank from bottom?

Riya is 9th from top in a class of 20. Rank from bottom?

Riya is 6th from top in a class of 31. Rank from bottom?

Riya is 31th from top in a class of 31. Rank from bottom?

Riya is 12th from top in a class of 30. Rank from bottom?

Riya is 13th from top in a class of 14. Rank from bottom?

Riya is 5th from top in a class of 12. Rank from bottom?

Riya is 8th from top in a class of 28. Rank from bottom?

Riya is 4th from top in a class of 15. Rank from bottom?

Riya is 18th from top in a class of 24. Rank from bottom?

Riya is 5th from top in a class of 15. Rank from bottom?

Riya is 13th from top in a class of 15. Rank from bottom?

Riya is 11th from top in a class of 16. Rank from bottom?

Riya is 2th from top in a class of 20. Rank from bottom?

Riya is 15th from top in a class of 20. Rank from bottom?

Riya is 12th from top in a class of 14. Rank from bottom?

Riya is 32th from top in a class of 35. Rank from bottom?

Riya is 4th from top in a class of 14. Rank from bottom?

Riya is 11th from top in a class of 17. Rank from bottom?

Riya is 26th from top in a class of 36. Rank from bottom?

Riya is 31th from top in a class of 36. Rank from bottom?

Riya is 11th from top in a class of 22. Rank from bottom?

Riya is 7th from top in a class of 18. Rank from bottom?