Question

If a sequence contains only whole numbers, which of these sequences could include the term 27?

Answer 1

Answer:

Its 2, 3, 4

Step-by-step explanation:

Answer 2

Depending on the first term, the sequences
$a_n=2a_{n-1}+1 \\ \\a_n=3a_{n-1} \\ \\a_n=a_{n-1}+6$
would work.

If the sequence began at 6, 
$a_n=2a_{n-1}+1=6, 13, 27, ...$

If the sequence began at 1, 
$a_n=3a_{n-1}=1, 3, 9, 27, ...$

If the sequence began at 3, 
$a_n=a_{n-1}+6=3, 9, 15, 21, 27, ...$