1, 2, 5 and 10.
Since 40 is a factor of 120, all of its factors are common.
The GCF of 40 and 120 is 40.One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.The factors of 120 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, and 120.The common factors are 1, 2, 4, 5, 8, 10, 20, and 40. Therefore, the greatest common factor is 40.Since 40 is a factor of 120, it is automatically the GCF.
The GCF is 10.
The least common multiple of 20 , 40 , 30 = 120
The Least Common Multiple (LCM) for 20 40 30 is 120.
The least common multiple of 20, 40, and 60 is 120.
The common factors are: 1, 2, 4, 5, 8, 10, 20, 40
Since 40 is a factor of 120, all the factors of 40 are common to 120. There can only be one greatest. 1, 2, 4, 5, 8, 10, 20, 40 The GCF is 40.
1, 2, 4, 5, 8, 10, 20 and 40, the GCF
The LCM of 20, 40, 80, and 120 is 240
The common factors are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 120 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, and 120. The common factors of 20 and 120 are 1, 2, 4, 5, 10, and 20. Therefore, the least (smallest) common factor is 1.