Question

Find the missing term
$3,6,15,(......),123,366,$

• A. $34$
• B. $59$
• C. $42$
• D. $60$

Answer 1

The correct option is C $42$

Take the differences between two terms
$6-3=3$
$15-6=9$
$x-15=y$
$123-x=z$
$366-123=243$
By doing trial and error,we find that
$y,z$ are $27,81$
$x-15=27$
$x=42$
So,option D is the correct answer.