12, 36, ?, 324, 972  Answers.
A) 108  B) 125  C) 215  D) 312  E) 368
Series pattern   Every next element = 3 x previous element   ∴ Missing term = 3 x 36 = 108 108nswer : 108
<result>A</result>
12, 36, ?, 324, 972