9x9=81. Proving that one of the factor trees for 81 is 9xp.
27 and 81 are a possibility. Also numbers like 5 and 10, 20 and 40.
873 x 29Since both 3 and 29 are prime numbers, the factor tree is complete.
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
19 is not a factor of 81. Factors of 81 are 1, 3, 9, 27, and 81
9x9=81. Proving that one of the factor trees for 81 is 9xp.
81 27,3 9,3,3 3,3,3,3
81 27,3 9,3,3 3,3,3,3
81 27,3 9,3,3 3,3,3,3
81 27,3 9,3,3 3,3,3,3
81 27,3 9,3,3 3,3,3,3
81 27,3 9,3,3 3,3,3,3
45 15,3 5,3,3 81 27,3 9,3,3 3,3,3,3
51 3,17 81 9,9 3,3,9 3,3,3,3 The GCF is 3.
The least common factor of two numbers is the smallest positive integer that both numbers can be evenly divided by. In this case, the factors of 81 are 1, 3, 9, 27, and 81, while the factors of 243 are 1, 3, 9, 27, 81, and 243. The least common factor of 81 and 243 is 81, as it is the smallest factor that both numbers share.
The greatest common factor for the numbers 27 and 81 are 27.
A factor tree of number is (I think) the numbers that multiply together to form a product. They are prime numbers, too.