Because 1000

So it's a double digit.

2. Because13 =1,2 3 = 8, 3 3 = 7 ... 9 3 = 9, the unit number of its cube root must be 9.

3. It must be 3, because 30 3 = 27000 and 40 3 = 64000, so since 593 19 is between 27000 and 64000, its cube root is also between 30 and 40, so its decimal is 3.

Please keep asking if you have any questions ~ ~