Cubes 1 to 20 Table for Bank Exams

Tricks to remember them

• The last digit: a cube ends in the same digit as the number for 0, 1, 4, 5, 6 and 9. For 2 and 8 it swaps (2³ = 8, 8³ = 512), and for 3 and 7 it swaps (3³ = 27, 7³ = 343).
• The next cube: (n + 1)³ = n³ + 3n² + 3n + 1. 11³ = 1331, so 12³ = 1331 + 363 + 33 + 1 = 1728.
• The sum of the first n cubes is the square of the sum: 1³ + 2³ + 3³ = 36 = (1 + 2 + 3)².

Cube root of a perfect cube

• The last digit of the cube tells the last digit of the root. 4913 ends in 3, and only 7³ ends in 3, so the root ends in 7.
• The thousands part tells the first digit: 4 lies between 1³ = 1 and 2³ = 8, so the first digit is 1. The root of 4913 is 17.

Cubes 1–20

1³

1

2³

8

3³

27

4³

64

5³

125

6³

216

7³

343

8³

512

9³

729

10³

1000

11³

1331

12³

1728

13³

2197

14³

2744

15³

3375

16³

4096

17³

4913

18³

5832

19³

6859

20³

8000