of the three vs of all three - English Language Usage Stack Exchange Both are correct You would usually use "A is the oldest of the three" if you were talking about three people from a larger group e g three girls who have two brothers, while you would use "A is the oldest of all three" if there were only three in the group e g three girls with no brothers
Three-times vs three times - English Language Usage Stack Exchange Three times as many cases of measles were reported in the United States in 2014 vs Three-times as many cases of measles were reported in the United States in 2014 Is there a difference between the normal and hyphenated versions? Which one is correct?
Three of which vs three of them? - English Language Usage Stack Exchange The correct sentence is: Four pits have been unearthed, three of which contained gold 'Of which' is correct because you need a possessive form to accurately describe the relationship between the three pits and the gold Three of the pits contain gold, i e , the gold is their 'possession' (in the grammatical sense)