ix

Everyday

1. (maths) The Roman numeral for 9: I (1) before X (10) means 10 minus 1. tree →
2. Used in names of kings, popes, chapters and events, like Charles IX or Super Bowl IX, read as «the ninth» or «nine». tree →
3. It is not an English word on its own; as small letters «ix» it is just two letters. tree →

In the lessons

In maths lessons Roman numerals teach place and subtraction: putting a smaller numeral before a bigger one means subtract. On clocks, in book chapters and in history (King Louis IX of France) you meet IX. Phrases: Chapter IX, Louis IX.

Examples

• IX means 9 in Roman numerals. tree →
• Chapter IX is the scariest part of the book. tree →
• King Louis IX of France lived in the 1200s. tree →
• On our old clock, the 9 is written as IX. tree →
• X minus I gives IX, which is 9. tree →
• Can you write 19 in Roman numerals? It is XIX. tree →
• Pope Pius IX is read «Pope Pius the Ninth». tree →

Note

Written in capitals: IX. Trap: some old clocks and puzzles show 9 as VIIII, but the usual form is IX; never IIX for 8 (8 is VIII). In maths, IX = 9, XI = 11: the order changes the value. Read «Henry IX» as «Henry the Ninth».

In Jewish tradition

In maths lessons Roman numerals teach place and subtraction: putting a smaller numeral before a bigger one means subtract. On clocks, in book chapters and in history (King Louis IX of France) you meet IX. Phrases: Chapter IX, Louis IX.

Examples

• Astle, The Origin and Progress of Writing, London 1784, p. 41: rhu!', IX, 354, 439). <)r he could have meant Jewish astronomers like JIashallah, who was called by Abraham ibn Eira an Indian sage (mr; Din) (see M. (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →

Note

Written in capitals: IX. Trap: some old clocks and puzzles show 9 as VIIII, but the usual form is IX; never IIX for 8 (8 is VIII). In maths, IX = 9, XI = 11: the order changes the value. Read «Henry IX» as «Henry the Ninth».