Page 25 - Math Genius C5
P. 25
E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_01
\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________
Rule 3: A smaller Roman numeral on the left side of a larger Roman numeral is always
subtracted from the larger Roman numeral.
Examples: (a) IX = 10 – 1 = 9 (b) XL = 50 – 10 = 40
( c) CD = 500 – 100 = 400 (d) CM = 1000 – 100 = 900
Knowledge Desk
In Roman numerals, the number 4 is written as IV but many clocks around Cross-Curricular Learning
the world still use the old method to represent it, that is, the number IIII
instead of the number IV.
One of the most important clocks showing this is the clock tower of the Palace
of Westminster.
Practice time 1F
1. Write the Roman numerals for the following numbers.
( a) 328 (b) 518 (c) 892
( d) 2090 (e) 785 (f) 1600
2. Write the Hindu-Arabic numerals for the following Roman numerals.
( a) XXXV (b) LXXIII (c) VII
( d) MIX (e) CLXV (f) MXXXIV
3. Use >, < or = to compare the following.
( a) CDIV 406 (b) CCCXC 380 (c) CMXC 990
( d) CDVIII 208 (e) CCCLXXXVI 386 (f) CLXV 168
4. Which of the following are meaningless?
( a) CCI (b) XLVV (c) DD (d) ILIX
( e) XDVI (f) VLIII (g) CXL (h) CCXXV
5. Given below are some important events in the life of Mahatma Gandhi, the father of
our nation. Rewrite the years of these events in Roman numerals.
( a) Born in Porbandar, Gujarat – 1869 _________
( b) Married to Kasturba Gandhi – 1883 _________
( c) Started the boycott of British goods
and Non-Cooperation Movement – 1920 _________
( d) Lead the Salt March in Dandi – 1930 _________
( e) Launched the Quit India Movement – 1942 _________
( f) Kasturba Gandhi died – 1944 _________
( g) Gandhiji was assassinated in Delhi – 1948 _________
Mathematics-5
Mathematics-5 2323

