What will complete the series?
6, 24, 60, ?, 210
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 120
The terms grow fast and lie just below the cubes 8, 27, 64, ... , which points to \(n^3-n\) for \(n=2,3,4,\ldots\):
\(2^3-2=6\)
\(3^3-3=24\)
\(4^3-4=60\)
\(5^3-5=\) 120
\(6^3-6=210\)