Question

Complete the following series:

$1,2,3,2,3,5,4,5,?$

• A. $9$
• B. $6$
• C. $10$
• D. $7$
• E. $8$

Answer 1

The correct option is A $9$

In this series three numbers from a set. The first two numbers of each set are in natural order and the third number is the sum of first and second numbers. The first number of the next set begins with double the first number of the previous set.