**Question:** **PRIMAL SERIES **

Decide what the next 5 figures in this series should be: 0110101000101000101000

**Answer:**

10000

The title holds a hint, although this is still a tough puzzle. The series begins with the number 1, & continues through 22, giving a 1 for each prime number, & a 0 for each number that is not prime.

Of the last 5 numbers (23-27), only 23 is prime.