Question

6, 9 ,18, 45, 126 ,369?

Answer 1

Hey mate! Here's your answer:
the answer is 1098
If you take out the double difference 'you will get a pattern as 3,9,27,81,243.
and the logic used is 
3*3=9+9=18
9*3=27+18=45
27*3=81+45=126
81*3=243+126=369
243*3=729+369=1098
so the answer is 729+369=1098
Please mark it as the Brainliest!!