Complete the series: 8, 27, 64, 100, 125, 216, 343, _____?

100

125

343

This series follows the pattern of a "Perfect cube root".

Solution:

8 = It is the perfect cube of 2.

27 = It is the perfect cube of 3.

64 = It is the perfect cube of 4.

100 = It is not a perfect cube of any number.

125 = It is the perfect cube of 5.

216 = It is the perfect cube of 6.

343 = It is the perfect cube of 7.

Hence, the correct answer is "100".