Find LCM of 18 and 24 .
LCM is appearently 240 .
Green rows are for GCD .
GCD of the numbers given = ?
Have a look at ry1.
A=2x3x ... x 19 and B=1x2x3x ... x14x15. This means A = 16x17x18x19 x B , i.e. a multiple of B.
16x17=16x(16+1)=256+16=272 ... and the question : 272x342 = ?
A=2x3x ... x53x54 and B=1x2x3x ... x54x55
There are multiples of 5 but only a lone 5 in each set since the sets are of prime factors .
The product of 3 numbers is not the product of their LCM and GCD .
The product of 2 numbers is the product of their LCM and GCD.