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420 in Roman Numerals
420 in Roman numerals is CDXX. To convert 420 in Roman Numerals, we will write 420 in the expanded form, i.e. 420 = (500  100) + 10 + 10 thereafter replacing the transformed numbers with their respective roman numerals, we get 420 = (D  C) + X + X = CDXX. In this article, we will explain how to correctly transform 420 in Roman numerals.
 420 = (500  100) + 10 + 10
 Roman Numerals = (D  C) + X + X
 420 in Roman Numerals = CDXX
1.  How to Write 420 in Roman Numerals? 
2.  Basic Rules 
3.  Numbers related to 420 
4.  FAQs on 420 in Roman Numerals 
How to Write 420 in Roman Numerals?
Roman numerals for 420 can be obtained by using the method given below:
In this method, we break 420 into the least expandable form, write their respective roman letter and add/subtract them, i.e. 420 = (500  100) + 10 + 10 = (D  C) + X + X = CDXX.
Therefore, the value of 420 in roman numerals is CDXX.
ā Also Check: Roman Numerals Calculator
Basic Rules to Interpret Roman Numerals
 When a bigger letter precedes a smaller letter, the letters are added. For example: MX, M > X, so MX = M + X = 1000 + 10 = 1010.
 When a smaller letter precedes a bigger letter, the letters are subtracted. For example: IX, I < X, so IX = X  I = 10  1 = 9.
 When a letter is repeated multiple times, they get added. For example: MMM = M + M + M = 1000 + 1000 + 1000 = 3000
 The same letter cannot be used more than three times in succession.
Roman Numerals for Numbers Related to 420
Roman numerals may seem different from numbers, but they are similar. For example, 420 in roman numerals is equivalent to CDXX. The roman numerals for numbers related to 420 are given below:
 CDXX = 400 + 20 = 420
 CDXXI = 400 + 20 + 1 = 421
 CDXXII = 400 + 20 + 2 = 422
 CDXXIII = 400 + 20 + 3 = 423
 CDXXIV = 400 + 20 + 4 = 424
 CDXXV = 400 + 20 + 5 = 425
 CDXXVI = 400 + 20 + 6 = 426
 CDXXVII = 400 + 20 + 7 = 427
 CDXXVIII = 400 + 20 + 8 = 428
 CDXXIX = 400 + 20 + 9 = 429
420 in Roman Numerals Examples

Example 1: Find the Value of (18  46) + 420 in roman numerals.
Solution:
Solving (18  46) + 420 = 28 + 420 = 392. Now, we will write the answer, that is, 392 = 300 + 90 + 2 = CCC + XC + II = CCCXCII.

Example 2: What is the remainder when CDXX is divided by VIII?
Solution:
VIII = 8 and CDXX = 420 in numbers.
On dividing 420 by 8, it leaves a remainder of 4.
Now, 4 = IV
Therefore, when CDXX is divided by VIII, the remainder is IV. 
Example 3: Find the value of 2086  420.
Solution:
Solving the given problem, 2086  420 = 1666
To determine the value of 2086  420 in roman numerals, we will express 1666 in the expanded form, i.e. 1666 = 1000 + 600 + 60 + 6 = M + DC + LX + VI = MDCLXVI. 
Example 4: Find the Difference Between 448 and 420 in Roman Numerals.
Solution:
Solving the given problem, 448  420 = 28
To determine the value of 448  420 in roman numerals, we will express 28 in the expanded form, i.e., 28 = 20 + 8 = XX + VIII = XXVIII.
FAQs on 420 in Roman Numerals
What does 420 in Roman Numerals Mean?
To write 420 in roman numerals, we will first express 420 in expanded form. 420 = (500  100) + 10 + 10 = (D  C) + X + X = CDXX. Hence, 420 in roman numbers is expressed as CDXX.
What Should be Added to 15 to Get 420? Write the answer in Roman numerals.
420 in roman numerals is CDXX whereas 15 is XV. 420  15 = 405. Therefore, 405 should be added to 15 to get 420. Now, to convert 405 in roman numbers, we will express it in its expanded form, that is, 405 = (500  100) + 5 = (D  C) + V = CDV.
What is the Value of (47  72) + 420 in Roman Numbers?
Solving (47  72) + 420 = 25 + 420 = 395. To express, (47  72) + 420 in roman numerals, we will write the answer, that is, 395 in expanded form. 395 = 100 + 100 + 100 + (100  10) + 5 = C + C + C + (C  X) + V = CCCXCV
Why is 420 in Roman Numerals Written as CDXX?
We know that in roman numerals, we write 10 as X, and 400 as CD. Therefore, 420 in roman numerals is written as 420 = 400 + 20 = CD + XX = CDXX.
How do you Write the Number 420 in Roman Numerals?
To convert 420 in roman numerals, the conversion involves breaking the numbers based on place values (ones, tens, hundreds, thousands).
 Hundreds = 400 = CD
 Tens = 20 = XX
 Number = 400 + 20 = CD + XX = CDXX
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