How do I cube numbers in my head?

I am pretty good at math and was able to figure out a simple way to square numbers in my head. I have been trying to find a way to cube numbers now but I have not found a way. I've been at it for a week and i think I will give up. If you guys know a simple way to cube numbers, can you tell me?How do I cube numbers in my head?
If you can square numbers in your head, then you can cube numbers in your head.





Let n虏 be a perfect square. Then n*n虏 is a perfect cube.





For example, if you know that 16 is a perfect square because it is 4虏, then you know 64 is a perfect cube because it is 4*16.How do I cube numbers in my head?
OK, since you figured out how to square numbers in your head, just multiply that answer by the original number. not too too difficult, just annoying. also, memorize the powers of two and five. they will help a lot. here, lemme help you out.





2,4,8,16,32,64,128,256,512,


1024,2048,4096,8192.





5,25,125,625,3125, 15625. see the pattern in that one?





i did those both without a calculator. i am in geometry 1 honors.
If your good at math then just multiply the squares by the original numbers in you head.