Because 210 is the smallest number that both 30 and 42 divide into equally with no remainder.
If you mean 2, 3 and 7 as factors then the smallest number is 42
An infinite number of of multiples of 42 can be divided by 42.
42
The number is 6.
The smallest number that can be divided by both 30 and 42 is 210.
42
The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.However, I suspect that you mean either:What is the highest common factor of 30 and 42?ie what is the highest number that is a factor of both 30 and 42: hcf = 6;What is the lowest common multiple of 30 and 42?ie that is the smallest number that is a multiple of both 30 and 42 lcm = 210.
If you have 42 treaties they can be divided into 6 groups with 7 treaties in each group or 7 groups with 6 in each. No smaller number of treaties can be divided into groups of 6 or 7.
30 + 12 = 42. 42 divided by 7 is 6.
4.2857
A common multiple of any two numbers, such as 30 and 42, is a number into which each of two or more number can be divided with zero remainder. Any multiple of 210.
30% of 42= 30% * 42= 0.3 * 42= 12.6
Because 210 is the smallest number that both 30 and 42 divide into equally with no remainder.
213.7143
If you mean 2, 3 and 7 as factors then the smallest number is 42
15,120