1. This building is taller than other buildings in the city.
2. Cow is more useful than most other animals. (Comparative)
Cows are among the most useful animals. (Superlative)
3. Mt. Everest is higher than other peaks in the Himalayas.
4. Sir. Surendranath was a greater orator than any other Indian. (Comparative)
Sir. Surendranath is the greatest in India. (Superlative)
5. Ooty is healthier than other resorts in India. (Comparative)
Ooty is the healthiest resort in India. (Superlative)
Hope that helps!!