Question

Which number will complete the following number sequence ?
16, 54, 128, ?, 432

Answer 1

This is a relatively simple sequence and based on cubes.
$2^3\times 2=16$
$3^3\times 2=54$
$4^3\times 2=128$ & $6^3\times 2=432$ The only remaining value is $5^3\times 2=250$.