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2 <p>Last updated on<strong>September 9, 2025</strong></p>

3 <p>The GCF is the largest number that can divide two or more numbers without leaving any remainder. GCF is used to share items equally, to group or arrange items, and to schedule events. In this topic, we will learn about the GCF of 6 and 42.</p>

4 <h2>What is the GCF of 6 and 42?</h2>

5 <p>The<a>greatest common factor</a>of 6 and 42 is 6. The largest<a>divisor</a>of two or more<a>numbers</a>is called the GCF of the number.</p>

6 <p>If two numbers are co-prime, they have no common factors other than 1, so their GCF is 1. The GCF of two numbers cannot be negative because divisors are always positive.</p>

7 <h2>How to find the GCF of 6 and 42?</h2>

8 <p>To find the GCF of 6 and 42, a few methods are described below:</p>

9 <ul><li>Listing Factors </li>

10 <li>Prime Factorization </li>

11 <li>Long Division Method / by Euclidean Algorithm</li>

12 </ul><h3>GCF of 6 and 42 by Using Listing of Factors</h3>

13 <p>Steps to find the GCF of 6 and 42 using the listing of<a>factors</a>:</p>

14 <p><strong>Step 1:</strong>Firstly, list the factors of each number. Factors of 6 = 1, 2, 3, 6. Factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42.</p>

15 <p><strong>Step 2:</strong>Now, identify the<a>common factors</a>of them. Common factors of 6 and 42: 1, 2, 3, 6.</p>

16 <p><strong>Step 3:</strong>Choose the largest factor. The largest factor that both numbers have is 6. The GCF of 6 and 42 is 6.</p>

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19 <h3>GCF of 6 and 42 Using Prime Factorization</h3>

18 <h3>GCF of 6 and 42 Using Prime Factorization</h3>

20 <p>To find the GCF of 6 and 42 using the Prime Factorization Method, follow these steps:</p>

19 <p>To find the GCF of 6 and 42 using the Prime Factorization Method, follow these steps:</p>

21 <p><strong>Step 1:</strong>Find the<a>prime factors</a>of each number. Prime Factors of 6: 6 = 2 × 3 Prime Factors of 42: 42 = 2 × 3 × 7</p>

20 <p><strong>Step 1:</strong>Find the<a>prime factors</a>of each number. Prime Factors of 6: 6 = 2 × 3 Prime Factors of 42: 42 = 2 × 3 × 7</p>

22 <p><strong>Step 2:</strong>Now, identify the common prime factors. The common prime factors are: 2 × 3</p>

21 <p><strong>Step 2:</strong>Now, identify the common prime factors. The common prime factors are: 2 × 3</p>

23 <p><strong>Step 3:</strong>Multiply the common prime factors. 2 × 3 = 6. The Greatest Common Factor of 6 and 42 is 6.</p>

22 <p><strong>Step 3:</strong>Multiply the common prime factors. 2 × 3 = 6. The Greatest Common Factor of 6 and 42 is 6.</p>

24 <h3>GCF of 6 and 42 Using Division Method or Euclidean Algorithm Method</h3>

23 <h3>GCF of 6 and 42 Using Division Method or Euclidean Algorithm Method</h3>

25 <p>Find the GCF of 6 and 42 using the<a>division</a>method or Euclidean Algorithm Method. Follow these steps:</p>

24 <p>Find the GCF of 6 and 42 using the<a>division</a>method or Euclidean Algorithm Method. Follow these steps:</p>

26 <p><strong>Step 1:</strong>First, divide the larger number by the smaller number. Here, divide 42 by 6. 42 ÷ 6 = 7 (<a>quotient</a>), The<a>remainder</a>is calculated as 42 - (6×7) = 0. The remainder is zero, so the divisor will become the GCF. The GCF of 6 and 42 is 6.</p>

25 <p><strong>Step 1:</strong>First, divide the larger number by the smaller number. Here, divide 42 by 6. 42 ÷ 6 = 7 (<a>quotient</a>), The<a>remainder</a>is calculated as 42 - (6×7) = 0. The remainder is zero, so the divisor will become the GCF. The GCF of 6 and 42 is 6.</p>

27 <h2>Common Mistakes and How to Avoid Them in GCF of 6 and 42</h2>

26 <h2>Common Mistakes and How to Avoid Them in GCF of 6 and 42</h2>

28 <p>Finding the GCF of 6 and 42 looks simple, but students often make mistakes while calculating the GCF. Here are some common mistakes to be avoided by the students.</p>

27 <p>Finding the GCF of 6 and 42 looks simple, but students often make mistakes while calculating the GCF. Here are some common mistakes to be avoided by the students.</p>

29 <h3>Problem 1</h3>

28 <h3>Problem 1</h3>

30 <p>A baker has 6 chocolate cakes and 42 vanilla cakes. She wants to arrange them into equal groups with the largest number of cakes in each group. How many cakes will be in each group?</p>

29 <p>A baker has 6 chocolate cakes and 42 vanilla cakes. She wants to arrange them into equal groups with the largest number of cakes in each group. How many cakes will be in each group?</p>

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

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

32 <p>We should find the GCF of 6 and 42. GCF of 6 and 42 2 × 3 = 6. There are 6 equal groups. 6 ÷ 6 = 1 42 ÷ 6 = 7 There will be 6 groups, and each group gets 1 chocolate cake and 7 vanilla cakes.</p>

31 <p>We should find the GCF of 6 and 42. GCF of 6 and 42 2 × 3 = 6. There are 6 equal groups. 6 ÷ 6 = 1 42 ÷ 6 = 7 There will be 6 groups, and each group gets 1 chocolate cake and 7 vanilla cakes.</p>

33 <h3>Explanation</h3>

32 <h3>Explanation</h3>

34 <p>As the GCF of 6 and 42 is 6, the baker can make 6 groups.</p>

33 <p>As the GCF of 6 and 42 is 6, the baker can make 6 groups.</p>

35 <p>Now divide 6 and 42 by 6.</p>

34 <p>Now divide 6 and 42 by 6.</p>

36 <p>Each group gets 1 chocolate cake and 7 vanilla cakes.</p>

35 <p>Each group gets 1 chocolate cake and 7 vanilla cakes.</p>

37 <p>Well explained 👍</p>

36 <p>Well explained 👍</p>

38 <h3>Problem 2</h3>

37 <h3>Problem 2</h3>

39 <p>A teacher has 6 apples and 42 oranges. She wants to divide them into rows with the same number of fruits in each row, using the largest possible number of fruits per row. How many fruits will be in each row?</p>

38 <p>A teacher has 6 apples and 42 oranges. She wants to divide them into rows with the same number of fruits in each row, using the largest possible number of fruits per row. How many fruits will be in each row?</p>

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

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

41 <p>GCF of 6 and 42 2 × 3 = 6. So each row will have 6 fruits.</p>

40 <p>GCF of 6 and 42 2 × 3 = 6. So each row will have 6 fruits.</p>

42 <h3>Explanation</h3>

41 <h3>Explanation</h3>

43 <p>There are 6 apples and 42 oranges.</p>

42 <p>There are 6 apples and 42 oranges.</p>

44 <p>To find the total number of fruits in each row, we should find the GCF of 6 and 42.</p>

43 <p>To find the total number of fruits in each row, we should find the GCF of 6 and 42.</p>

45 <p>There will be 6 fruits in each row.</p>

44 <p>There will be 6 fruits in each row.</p>

46 <p>Well explained 👍</p>

45 <p>Well explained 👍</p>

47 <h3>Problem 3</h3>

46 <h3>Problem 3</h3>

48 <p>A florist has 6 meters of red ribbon and 42 meters of white ribbon. She wants to cut both ribbons into pieces of equal length, using the longest possible length. What should be the length of each piece?</p>

47 <p>A florist has 6 meters of red ribbon and 42 meters of white ribbon. She wants to cut both ribbons into pieces of equal length, using the longest possible length. What should be the length of each piece?</p>

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

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

50 <p>For calculating the longest equal length, we have to calculate the GCF of 6 and 42. The GCF of 6 and 42 2 × 3 = 6. The ribbon is 6 meters long.</p>

49 <p>For calculating the longest equal length, we have to calculate the GCF of 6 and 42. The GCF of 6 and 42 2 × 3 = 6. The ribbon is 6 meters long.</p>

51 <h3>Explanation</h3>

50 <h3>Explanation</h3>

52 <p>For calculating the longest length of the ribbon, first we need to calculate the GCF of 6 and 42, which is 6.</p>

51 <p>For calculating the longest length of the ribbon, first we need to calculate the GCF of 6 and 42, which is 6.</p>

53 <p>The length of each piece of the ribbon will be 6 meters.</p>

52 <p>The length of each piece of the ribbon will be 6 meters.</p>

54 <p>Well explained 👍</p>

53 <p>Well explained 👍</p>

55 <h3>Problem 4</h3>

54 <h3>Problem 4</h3>

56 <p>A carpenter has two wooden planks, one 6 cm long and the other 42 cm long. He wants to cut them into the longest possible equal pieces, without any wood left over. What should be the length of each piece?</p>

55 <p>A carpenter has two wooden planks, one 6 cm long and the other 42 cm long. He wants to cut them into the longest possible equal pieces, without any wood left over. What should be the length of each piece?</p>

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

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

58 <p>The carpenter needs the longest piece of wood.</p>

57 <p>The carpenter needs the longest piece of wood.</p>

59 <p>GCF of 6 and 42 2 × 3 = 6.</p>

58 <p>GCF of 6 and 42 2 × 3 = 6.</p>

60 <p>The longest length of each piece is 6 cm.</p>

59 <p>The longest length of each piece is 6 cm.</p>

61 <h3>Explanation</h3>

60 <h3>Explanation</h3>

62 <p>To find the longest length of each piece of the two wooden planks, 6 cm and 42 cm respectively, we have to find the GCF of 6 and 42, which is 6 cm.</p>

61 <p>To find the longest length of each piece of the two wooden planks, 6 cm and 42 cm respectively, we have to find the GCF of 6 and 42, which is 6 cm.</p>

63 <p>The longest length of each piece is 6 cm.</p>

62 <p>The longest length of each piece is 6 cm.</p>

64 <p>Well explained 👍</p>

63 <p>Well explained 👍</p>

65 <h3>Problem 5</h3>

64 <h3>Problem 5</h3>

66 <p>If the GCF of 6 and ‘b’ is 6, and the LCM is 42, find ‘b’.</p>

65 <p>If the GCF of 6 and ‘b’ is 6, and the LCM is 42, find ‘b’.</p>

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

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

68 <p>The value of ‘b’ is 42.</p>

67 <p>The value of ‘b’ is 42.</p>

69 <h3>Explanation</h3>

68 <h3>Explanation</h3>

70 <p>GCF × LCM = product of the numbers</p>

69 <p>GCF × LCM = product of the numbers</p>

71 <p>6 × 42</p>

70 <p>6 × 42</p>

72 <p>= 6 × b 252</p>

71 <p>= 6 × b 252</p>

73 <p>= 6b b</p>

72 <p>= 6b b</p>

74 <p>= 252 ÷ 6 = 42</p>

73 <p>= 252 ÷ 6 = 42</p>

75 <p>Well explained 👍</p>

74 <p>Well explained 👍</p>

76 <h2>FAQs on the Greatest Common Factor of 6 and 42</h2>

75 <h2>FAQs on the Greatest Common Factor of 6 and 42</h2>

77 <h3>1.What is the LCM of 6 and 42?</h3>

76 <h3>1.What is the LCM of 6 and 42?</h3>

78 <p>The LCM of 6 and 42 is 42.</p>

77 <p>The LCM of 6 and 42 is 42.</p>

79 <h3>2.Is 6 divisible by 2?</h3>

78 <h3>2.Is 6 divisible by 2?</h3>

80 <p>Yes, 6 is divisible by 2 because it is an even number.</p>

79 <p>Yes, 6 is divisible by 2 because it is an even number.</p>

81 <h3>3.What will be the GCF of any two prime numbers?</h3>

80 <h3>3.What will be the GCF of any two prime numbers?</h3>

82 <p>The common factor of<a>prime numbers</a>is 1 and the number itself. Since 1 is the only common factor of any two prime numbers, it is said to be the GCF of any two prime numbers.</p>

81 <p>The common factor of<a>prime numbers</a>is 1 and the number itself. Since 1 is the only common factor of any two prime numbers, it is said to be the GCF of any two prime numbers.</p>

83 <h3>4.What is the prime factorization of 42?</h3>

82 <h3>4.What is the prime factorization of 42?</h3>

84 <p>The prime factorization of 42 is 2 × 3 × 7.</p>

83 <p>The prime factorization of 42 is 2 × 3 × 7.</p>

85 <h3>5.Are 6 and 42 prime numbers?</h3>

84 <h3>5.Are 6 and 42 prime numbers?</h3>

86 <p>No, 6 and 42 are not prime numbers because both of them have more than two factors.</p>

85 <p>No, 6 and 42 are not prime numbers because both of them have more than two factors.</p>

87 <h2>Important Glossaries for GCF of 6 and 42</h2>

86 <h2>Important Glossaries for GCF of 6 and 42</h2>

88 <ul><li><strong>Factors:</strong>Factors are numbers that divide the target number completely. For example, the factors of 6 are 1, 2, 3, and 6.<strong></strong></li>

87 <ul><li><strong>Factors:</strong>Factors are numbers that divide the target number completely. For example, the factors of 6 are 1, 2, 3, and 6.<strong></strong></li>

89 </ul><ul><li><strong>Multiple:</strong>Multiples are the products we get by multiplying a given number by another. For example, the multiples of 6 are 6, 12, 18, 24, and so on.</li>

88 </ul><ul><li><strong>Multiple:</strong>Multiples are the products we get by multiplying a given number by another. For example, the multiples of 6 are 6, 12, 18, 24, and so on.</li>

90 </ul><ul><li><strong>Prime Factors:</strong>These are the factors of a number that are prime numbers and divide the given number completely. For example, the prime factors of 42 are 2, 3, and 7.</li>

89 </ul><ul><li><strong>Prime Factors:</strong>These are the factors of a number that are prime numbers and divide the given number completely. For example, the prime factors of 42 are 2, 3, and 7.</li>

91 </ul><ul><li><strong>Remainder:</strong>The value left after division when the number cannot be divided evenly. For example, when 42 is divided by 5, the remainder is 2 and the quotient is 8.<strong></strong></li>

90 </ul><ul><li><strong>Remainder:</strong>The value left after division when the number cannot be divided evenly. For example, when 42 is divided by 5, the remainder is 2 and the quotient is 8.<strong></strong></li>

92 </ul><ul><li><strong>LCM:</strong>The smallest common multiple of two or more numbers is termed LCM. For example, the LCM of 6 and 42 is 42.</li>

91 </ul><ul><li><strong>LCM:</strong>The smallest common multiple of two or more numbers is termed LCM. For example, the LCM of 6 and 42 is 42.</li>

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

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

94 <p>▶</p>

93 <p>▶</p>

95 <h2>Hiralee Lalitkumar Makwana</h2>

94 <h2>Hiralee Lalitkumar Makwana</h2>

96 <h3>About the Author</h3>

95 <h3>About the Author</h3>

97 <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>

96 <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>

98 <h3>Fun Fact</h3>

97 <h3>Fun Fact</h3>

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

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