Thread:Sebbydoodle/@comment-25612966-20191217030608

Since 4*10an odd number is not square, this is how the naming would go:
 * /Monosquare (4)
 * /Decablock (40)
 * Hectosquare (400)
 * Kiloblock (4000)
 * Decakilosquare (40000)
 * Hectokiloblock (400000)
 * Megasquare (4000000)

Basically, when the power of ten is even (102x is a square), the name is [prefix]square, and when the power of ten is odd (102x±1 is not a square), the name is [prefix]block.

x is an integer, by the way. 