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2 <p>Last updated on<strong>August 5, 2025</strong></p>

3 <p>Roman numerals are a way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman Numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman Numerals, rules, and examples.</p>

4 <h2>What is 684 in Roman Numerals?</h2>

5 <p>The royal titles, such as Henry I, Henry II, and so on, use Roman Numerals. Earlier people used to count using fingers, sticks, bones, etc.</p>

6 <p>When life became complex, a<a>standard form</a>was required for counting. Ancient Romans used the Roman Numeral system to count. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the<a>symbols</a>we use to count.</p>

7 <p>In Roman Numerals, we write 684 as DCLXXXIV. Let's learn more about Roman numerals and how we write them.</p>

8 <h2>Basic Rules for 684 in Roman Numerals</h2>

9 <p>There are certain basic rules to write a<a>number</a>in Roman Numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.</p>

10 <h3><strong>Rule 1: Addition Method</strong></h3>

11 <p>The<a>addition</a>method is used when the smaller number is placed after the larger number. For example, VI → V + I → 5 + 1 = 6.</p>

12 <h3><strong>Rule 2: Repetition Method</strong></h3>

13 <p>To write a large number, some Roman Numerals can be repeated. For example, III → 3.</p>

14 <h3><strong>Rule 3: Subtraction Method</strong></h3>

15 <p>If a small number precedes a large number in Roman Numerals, we subtract the smaller number from the large number. For example, IX → X - I → 10 - 1 = 9.</p>

16 <h3><strong>Rule 4: Limitation Rule</strong></h3>

17 <p>The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we won't write VV for 10; instead, we use X, and 8 is written as VIII, not IIIIIIII.</p>

18 <h2>How to Write 684 in Roman Numerals</h2>

19 <p>Let’s now learn how to write 684 in Roman Numerals. Follow these methods to write the number in Roman Numerals.</p>

20 <ul><li><strong>By Expansion Method</strong></li>

21 <li><strong>By Grouping Method</strong></li>

22 </ul><h3>Explore Our Programs</h3>

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24 <h2>684 in Roman Numeral by Expansion Method</h2>

23 <h2>684 in Roman Numeral by Expansion Method</h2>

25 <p>In the expansion method, based on the<a>place value</a>, the number is broken down. In this section, we will learn how to write 684 in Roman numerals using the expansion method. To write 684 in Roman Numerals, follow the steps:</p>

24 <p>In the expansion method, based on the<a>place value</a>, the number is broken down. In this section, we will learn how to write 684 in Roman numerals using the expansion method. To write 684 in Roman Numerals, follow the steps:</p>

26 <p><strong>Step 1:</strong>Break the number based on place value. Place values are ones, tens, hundreds, etc. For 684, we write it as 600 + 80 + 4.</p>

25 <p><strong>Step 1:</strong>Break the number based on place value. Place values are ones, tens, hundreds, etc. For 684, we write it as 600 + 80 + 4.</p>

27 <p><strong>Step 2:</strong>Convert the number into Roman Numerals:</p>

26 <p><strong>Step 2:</strong>Convert the number into Roman Numerals:</p>

28 <ul><li>600 in Roman Numeral - DC </li>

27 <ul><li>600 in Roman Numeral - DC </li>

29 <li>80 in Roman Numeral - LXXX </li>

28 <li>80 in Roman Numeral - LXXX </li>

30 <li>4 in Roman Numeral - IV</li>

29 <li>4 in Roman Numeral - IV</li>

31 </ul><p><strong>Step 3:</strong>Combine the Roman Numerals together. Therefore, 684 in Roman Numerals is DC (600) + LXXX (80) + IV (4) = DCLXXXIV.</p>

30 </ul><p><strong>Step 3:</strong>Combine the Roman Numerals together. Therefore, 684 in Roman Numerals is DC (600) + LXXX (80) + IV (4) = DCLXXXIV.</p>

32 <h2>684 in Roman Numeral by Grouping Method</h2>

31 <h2>684 in Roman Numeral by Grouping Method</h2>

33 <p>When writing a large number into Roman Numerals, we group the number. To write 684 in Roman Numerals, we group 684 as 600 + 80 + 4.</p>

32 <p>When writing a large number into Roman Numerals, we group the number. To write 684 in Roman Numerals, we group 684 as 600 + 80 + 4.</p>

34 <ul><li>600 in Roman Numerals - DC </li>

33 <ul><li>600 in Roman Numerals - DC </li>

35 <li>80 in Roman Numerals - LXXX </li>

34 <li>80 in Roman Numerals - LXXX </li>

36 <li>4 in Roman Numerals - IV</li>

35 <li>4 in Roman Numerals - IV</li>

37 </ul><p>So, 684 is written as DCLXXXIV in Roman Numerals.</p>

36 </ul><p>So, 684 is written as DCLXXXIV in Roman Numerals.</p>

38 <h2>Common Mistakes and How to Avoid Them in 684 Roman Numerals</h2>

37 <h2>Common Mistakes and How to Avoid Them in 684 Roman Numerals</h2>

39 <p>Students make mistakes when writing numbers in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and ways to avoid them.</p>

38 <p>Students make mistakes when writing numbers in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and ways to avoid them.</p>

40 <h3>Problem 1</h3>

39 <h3>Problem 1</h3>

41 <p>Calculate the sum of CDXXV and CCLIX in Roman numerals.</p>

40 <p>Calculate the sum of CDXXV and CCLIX in Roman numerals.</p>

42 <p>Okay, lets begin</p>

41 <p>Okay, lets begin</p>

43 <p>The sum of CDXXV and CCLIX is DCLXXXIV.</p>

42 <p>The sum of CDXXV and CCLIX is DCLXXXIV.</p>

44 <h3>Explanation</h3>

43 <h3>Explanation</h3>

45 <p>First, convert the Roman numerals to numbers:</p>

44 <p>First, convert the Roman numerals to numbers:</p>

46 <p>CDXXV = 425</p>

45 <p>CDXXV = 425</p>

47 <p>CCLIX = 259.</p>

46 <p>CCLIX = 259.</p>

48 <p>The sum of 425 and 259 is 684.</p>

47 <p>The sum of 425 and 259 is 684.</p>

49 <p>In Roman numerals, 684 is written as DCLXXXIV.</p>

48 <p>In Roman numerals, 684 is written as DCLXXXIV.</p>

50 <p>Well explained 👍</p>

49 <p>Well explained 👍</p>

51 <h3>Problem 2</h3>

50 <h3>Problem 2</h3>

52 <p>A historian found DCLXXXIV ancient coins and wants to distribute them equally among VIII museums. How many coins will each museum receive?</p>

51 <p>A historian found DCLXXXIV ancient coins and wants to distribute them equally among VIII museums. How many coins will each museum receive?</p>

53 <p>Okay, lets begin</p>

52 <p>Okay, lets begin</p>

54 <p>Each museum will receive LXXXV coins.</p>

53 <p>Each museum will receive LXXXV coins.</p>

55 <h3>Explanation</h3>

54 <h3>Explanation</h3>

56 <p>To find the number of coins each museum receives, divide the total coins by the number of museums:</p>

55 <p>To find the number of coins each museum receives, divide the total coins by the number of museums:</p>

57 <p>DCLXXXIV / VIII.</p>

56 <p>DCLXXXIV / VIII.</p>

58 <p>Convert the Roman numerals to numbers:</p>

57 <p>Convert the Roman numerals to numbers:</p>

59 <p>DCLXXXIV = 684</p>

58 <p>DCLXXXIV = 684</p>

60 <p>VIII = 8.</p>

59 <p>VIII = 8.</p>

61 <p>Then, 684 / 8 = 85.</p>

60 <p>Then, 684 / 8 = 85.</p>

62 <p>In Roman numerals, 85 is LXXXV.</p>

61 <p>In Roman numerals, 85 is LXXXV.</p>

63 <p>Therefore, each museum receives LXXXV coins.</p>

62 <p>Therefore, each museum receives LXXXV coins.</p>

64 <p>Well explained 👍</p>

63 <p>Well explained 👍</p>

65 <h3>Problem 3</h3>

64 <h3>Problem 3</h3>

66 <p>Find the product of LXVIII and X in Roman numerals.</p>

65 <p>Find the product of LXVIII and X in Roman numerals.</p>

67 <p>Okay, lets begin</p>

66 <p>Okay, lets begin</p>

68 <p>The product of LXVIII and X is DCLXXX.</p>

67 <p>The product of LXVIII and X is DCLXXX.</p>

69 <h3>Explanation</h3>

68 <h3>Explanation</h3>

70 <p>Convert the Roman numerals to numbers: LXVIII = 68 and X = 10.</p>

69 <p>Convert the Roman numerals to numbers: LXVIII = 68 and X = 10.</p>

71 <p>Multiply the numbers:</p>

70 <p>Multiply the numbers:</p>

72 <p>68 × 10 = 680.</p>

71 <p>68 × 10 = 680.</p>

73 <p>In Roman numerals, 680 is written as DCLXXX.</p>

72 <p>In Roman numerals, 680 is written as DCLXXX.</p>

74 <p>Well explained 👍</p>

73 <p>Well explained 👍</p>

75 <h3>Problem 4</h3>

74 <h3>Problem 4</h3>

76 <p>What is the difference between DCC and XVI in Roman numerals?</p>

75 <p>What is the difference between DCC and XVI in Roman numerals?</p>

77 <p>Okay, lets begin</p>

76 <p>Okay, lets begin</p>

78 <p>The difference between DCC and XVI is DCLXXXIV.</p>

77 <p>The difference between DCC and XVI is DCLXXXIV.</p>

79 <h3>Explanation</h3>

78 <h3>Explanation</h3>

80 <p>Convert the Roman numerals to numbers:</p>

79 <p>Convert the Roman numerals to numbers:</p>

81 <p>DCC = 700</p>

80 <p>DCC = 700</p>

82 <p>XVI = 16.</p>

81 <p>XVI = 16.</p>

83 <p>Subtract the numbers:</p>

82 <p>Subtract the numbers:</p>

84 <p>700 - 16 = 684.</p>

83 <p>700 - 16 = 684.</p>

85 <p>In Roman numerals, 684 is written as DCLXXXIV.</p>

84 <p>In Roman numerals, 684 is written as DCLXXXIV.</p>

86 <p>Well explained 👍</p>

85 <p>Well explained 👍</p>

87 <h3>Problem 5</h3>

86 <h3>Problem 5</h3>

88 <p>Write the Roman numeral for 500 + 184 using the expansion method.</p>

87 <p>Write the Roman numeral for 500 + 184 using the expansion method.</p>

89 <p>Okay, lets begin</p>

88 <p>Okay, lets begin</p>

90 <p>The Roman numeral for 500 + 184 is DCLXXXIV.</p>

89 <p>The Roman numeral for 500 + 184 is DCLXXXIV.</p>

91 <h3>Explanation</h3>

90 <h3>Explanation</h3>

92 <p>First, convert the numbers 500 and 184 into Roman numerals:</p>

91 <p>First, convert the numbers 500 and 184 into Roman numerals:</p>

93 <p>500 = D</p>

92 <p>500 = D</p>

94 <p>184 = CLXXXIV.</p>

93 <p>184 = CLXXXIV.</p>

95 <p>Add the numbers together:</p>

94 <p>Add the numbers together:</p>

96 <p>500 + 184 = 684.</p>

95 <p>500 + 184 = 684.</p>

97 <p>Using the expansion method:</p>

96 <p>Using the expansion method:</p>

98 <p>684 = 600 + 80 + 4 = DCLXXXIV.</p>

97 <p>684 = 600 + 80 + 4 = DCLXXXIV.</p>

99 <p>Well explained 👍</p>

98 <p>Well explained 👍</p>

100 <h2>FAQs on 684 in Roman Numerals</h2>

99 <h2>FAQs on 684 in Roman Numerals</h2>

101 <h3>1.What is 9 in Roman numerals?</h3>

100 <h3>1.What is 9 in Roman numerals?</h3>

102 <p>IX is 9, as it has smaller numbers following larger ones using the subtraction method. That is I - X, which is 10 - 1 = 9.</p>

101 <p>IX is 9, as it has smaller numbers following larger ones using the subtraction method. That is I - X, which is 10 - 1 = 9.</p>

103 <h3>2.How to write 684 in Roman numerals?</h3>

102 <h3>2.How to write 684 in Roman numerals?</h3>

104 <p>Here, the larger numbers are followed by smaller ones, so we use the addition method. That is DC (600) + LXXX (80) + IV (4) = 684. So, DCLXXXIV is 684.</p>

103 <p>Here, the larger numbers are followed by smaller ones, so we use the addition method. That is DC (600) + LXXX (80) + IV (4) = 684. So, DCLXXXIV is 684.</p>

105 <h3>3.What is 680 in Roman Numerals?</h3>

104 <h3>3.What is 680 in Roman Numerals?</h3>

106 <p>680 in Roman Numerals is written as DCLXXX.</p>

105 <p>680 in Roman Numerals is written as DCLXXX.</p>

107 <h3>4.Is DCLXXXIV a prime number?</h3>

106 <h3>4.Is DCLXXXIV a prime number?</h3>

108 <p>No, 684 is not a<a>prime number</a>. It has divisors other than 1 and itself, like 2, 3, 4, 6, etc.</p>

107 <p>No, 684 is not a<a>prime number</a>. It has divisors other than 1 and itself, like 2, 3, 4, 6, etc.</p>

109 <h3>5.What are the multiples of 684?</h3>

108 <h3>5.What are the multiples of 684?</h3>

110 <p>The<a>multiples</a>of 684 are 684, 1368, 2052, 2736, 3420, and so on.</p>

109 <p>The<a>multiples</a>of 684 are 684, 1368, 2052, 2736, 3420, and so on.</p>

111 <h2>Important Glossaries for 684 in Roman Numerals</h2>

110 <h2>Important Glossaries for 684 in Roman Numerals</h2>

112 <ul><li><strong>Addition rule:</strong>The addition method is used when a large number is followed by a smaller numeral, where the values are added. For example, DC = D + C = 500 + 100 = 600. </li>

111 <ul><li><strong>Addition rule:</strong>The addition method is used when a large number is followed by a smaller numeral, where the values are added. For example, DC = D + C = 500 + 100 = 600. </li>

113 <li><strong>Subtraction rule:</strong>When a smaller numeral precedes a larger numeral, we subtract the smaller from the larger. For example, IV = V - I = 5 - 1 = 4. </li>

112 <li><strong>Subtraction rule:</strong>When a smaller numeral precedes a larger numeral, we subtract the smaller from the larger. For example, IV = V - I = 5 - 1 = 4. </li>

114 <li><strong>Expansion method:</strong>This method involves breaking down a number based on place value and converting each part into Roman numerals. For example, 684 = 600 + 80 + 4 = DCLXXXIV. </li>

113 <li><strong>Expansion method:</strong>This method involves breaking down a number based on place value and converting each part into Roman numerals. For example, 684 = 600 + 80 + 4 = DCLXXXIV. </li>

115 <li><strong>Grouping method:</strong>Here, the given number is grouped based on its place value and then converted into its Roman numerals. For example, 684 = 600 + 80 + 4 = DCLXXXIV. </li>

114 <li><strong>Grouping method:</strong>Here, the given number is grouped based on its place value and then converted into its Roman numerals. For example, 684 = 600 + 80 + 4 = DCLXXXIV. </li>

116 <li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, III = 3 (I is repeated three times to represent 3).</li>

115 <li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, III = 3 (I is repeated three times to represent 3).</li>

117 </ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>

116 </ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>

118 <p>▶</p>

117 <p>▶</p>

119 <h2>Hiralee Lalitkumar Makwana</h2>

118 <h2>Hiralee Lalitkumar Makwana</h2>

120 <h3>About the Author</h3>

119 <h3>About the Author</h3>

121 <p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>

120 <p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>

122 <h3>Fun Fact</h3>

121 <h3>Fun Fact</h3>

123 <p>: She loves to read number jokes and games.</p>

122 <p>: She loves to read number jokes and games.</p>