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Its factors are: 1 3 7 and 21
Note that 3 and 7 are prime numbers
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What is the greatest common factor of 21 and 651?
The factors of the two numbers are :- 51 : 1, 3, 17 and 51 21 : 1, 3, 7 and 21. Ignoring the trivial factor of 1, the only common factor and therefore the greatest common factor is 3.
What is the factor of the following 18 21 84 164?
The highest common factor of the given numbers is 1
What numbers have 3 and 7 as common factors?
21 and 28 have 7 as a factor.
What is the least common multiple of two numbers that have no common factor greater than one?
It depends on what the numbers are. For example, if the prime numbers you were talking about were 3 and 7, the least common multiple would be 21. If your numbers were 2 and 3, it would be 6.
What number do 12 21 and 63 have in common?
The only common factor of all three numbers is 3. (The numbers 21 and 63 share all of the factors of 21 : 1, 3, 7, and 21.)
What is the factor tree of 21?
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
Which numbers appear on the bottom row for a factor tree of 21?
3 and 7
Factor tree is made of 21 which numbers appear on the bottom row?
3 and 7
What is a factor tree and how do you know when a factor tree a completed?
21
What is the answer for 21 on a factor tree?
21 3,7
What is the factor tree for 21?
21 3,7
Express 126 as a product of prime numbers?
Factor tree:126|63 and 2|21 and 32 x 3 x 21 = 126
What is a factor tree for 21?
21/ \7 3
What is the GCF factor tree of 21?
21 3,7
How do you make a factor tree for 189?
First, find two numbers that when multiplied together equal 189. I can tell by looking at the number that it is divisible by 9. Any number whose digits add up to a number divisible by 9 is also divisible by 9. 1 + 8 + 9 = 18, which is divisible by 9. 189 ÷ 9 is 21. So, the top of our factor tree is: 189 9 x 21 Now, determine two pairs of numbers that when multiplied together, one pair will equal 9 and the other pair will equal 21. 9 = 3 x 3 and 21 = 7 x 3. So, now our factor tree is: 189 9 x 21 (3x3) x (7x3) You would continue doing this until you no more numbers can be factored. Since 3 and 7 are prime numbers, the factor tree is finished. The factor tree shows that the prime factorization of 189 is 3 x 3 x 3 x 7 or 33 x 7.
What is 21 as a factor tree?
21 is equal to 3 times 7.
How do you use a factor tree with using the number 21?
21 3,7
