Question

Three numbers are in the ratio 1:2:3. The sum of their cubes is 7776. What is the smallest number?

Answer 1

as multiplying 1:2:3 by 6 it gives 6:12:18 which in turn when cubed gives 216:1728:5832.when we add them 216+1728+5832 it gives 7776.
the answer is 216 the cube of 6.