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(c) 27 = XX + VII

= XXVII
Therefore, 27 is XXVII.

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Example 2

Write the following Roman number in numerals:
(a) XXI (b) XXXIII

Solution
(a) XXI = 20 + 1 (b) XXXIII = 30 + 3

= 21 = 33
Therefore, XXI is 21. Therefore, XXXIII is 33.

Exercise 3

1. Write the following numerals in Roman numbers:

(a) 29 (b) 26 (c) 32 (d) 23

2. Write each of the following Roman number in numerals.
(a) XXII (b) XXXI (c) XXX (d) XXV

3. Write the missing Roman numbers in each sequence:

(a) XXI, ____, XXIII, ____, ____, XXVI

(b) XXIV, ____, XXVI, ____, ____, XXIX, ____, ____, ____

(c) XXXII, ____, XXX ____, XXVIII, ____, XXVI

(d) ____, ____, XXV, ____, XXIII, XXII, ____

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