Find the smallest number by which 1372 must be multiplied to obtain a perfect cube.

1372 = 2 x 2 x 7 x 7 x 7

Here, In 1372, 2 is present only two times.

If we multiply 2 by 1372 we obtain a perfect cube.

1372 x 2 = 2 x 2 x 2 x 7 x 7 x 7

1372 x 2 = (2 x 7)³

1372 x 2 = 14³

Thus, option A is the correct answer.