18 is the lowest one.
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The least common multiple of 3 and 9 is 9. because: Multiples of three are: 3, 6, 9, 12, 15... Multiples of nine are: 9, 18, 27, 36.... The Least Common Multiple (LCM) there in both of the numbers is 9.
The LCM of 6 and 9 is: 18The prime factorization of 6 is 2 * 3The prime factorization of 9 is 3 * 3The LCM of 6 and 9 is 2 * 3 * 3 = 18Another method is to compare the multiples of each number in the set.The multiples of 6 are 6, 12, 18, 24, 30, and so onThe multiples of 9 are 9, 18, 27, 36, and so onSo the lowest common multiple is 18, as it's the smallest number that is in both lists.6x1=6 6x2=12 6x3=189x1=9 9x2=18 9x2=18The Least Common Multiple (LCM) for 6 9 is 18.
2/9 time 3 = 2 x 3/9 = 6/9 = 2/32/3
Since 9 is a multiple of 3, to answer this question we want only the multiples of 3 that are also multiples of 9. Thus, we need not consider 3 in answering this question. Thus we want to know the common multiples of 2 and 9. For positive integers, examples are 9x2x1=18, 9x2x2=36, 9x2x3=54, 9x2x4=72, .... Keep adding 18 to get more in this infinitely large set. This is an unusual question; was it an assignment for a class? For most math problems, it is only the least common multiple (LCM) that is needed, which is 18 for this question.
2/9 + 1/3 = 2/9 + 3/9 - Note the equivalence of the fraction 1/3 & 3/9 Add the numerators 5/9 The Answer . 5/9 = 0.555.... ( recurring to infinity as a decimal).