It is: 39
If the 2 digit number is a multiple of both 5 and 7 then it is a multiple of (5 x 7) which equals 35. The only even 2 digit number which is a multiple of 35 is, 2 x 35 = 70
3,5,6
It is 70
35
35 is a multiple of 7.
35 5X7 = 35
35
It is 105
35 is an odd number, so no even number can go into it.
7 is prime, so it's lowest common multiple with anything that isn't itself a multiple of 7 (in which case the LCM would just be the other number itself) is that number times seven (in this case, 175).
35 is an odd composite number
The Least Common Multiple is 35(this occurs when the larger number is already a multiple of the smaller one)(*The Greatest Common Factor is 7. This likewise occurs when the smaller number is a factor of the larger number.)Since 35 is a multiple of 7, it is automatically the LCM.