Question 242871
Well the lowest common multiple (LCM) means the lowest common whole number that all three numbers share when multiplied by a number greater than 1.

So {{{35*2 = 70}}}
   {{{10*7 = 70}}}
   {{{5*14 = 70}}}

So 70 is the LCM.

The greatest common divisor (GCD) is the biggest whole number that can be divided into all three numbers. This must be 5.

{{{35/5=7}}}
{{{10/5=2}}}
{{{5/5=1}}}

The difference between the LCM and GCD is 65. So c).

Does that make sense?