Answer:
64 and 125 are perfect cubes
Step-by-step explanation:
Let us see all numbers one by one
3: It cannot be written as a product of three same numbers so it is not a perfect cube.
64: It can be written as:
4*4*4 = 4^3
So 64 is a perfect cube
81: It cannot be written as a product of three same numbers so it is not a perfect cube.
125: It can be written as:
5*5*5 = 5^3
So 125 is a perfect cube
999: It cannot be written as a product of three same numbers so it is not a perfect cube.
3000: It cannot be written as a product of three same numbers so it is not a perfect cube ..
