Question

What are the digits in the units place of the cubes of 1,2,3,4,5,6,7,8,9,10? Is impossible to say that a number is not a perfect cube by looking at the digit in the units place of the given number, just like you did for squares?

Answer 1

13=1 

23 = 8 

33 = 27

 4³= 64 

5³ = 125 

6³ = 216 

7³ = 343 

8³ = 512 

9³ = 729 

10³ = 1000 

∴ It is not possible to say whether the number is a perfect cube (or) not looking at the digit in unit place.