solvable (adjective)

1. In Greek mythology, the riddle of the Sphinx was solvable to those who could answer correctly.

2. The puzzle of who killed President Kennedy is considered to be solvable with the right evidence.

3. The puzzle of how to maximize natural light in a small space is solvable with the right layout and window placement.

4. In the cartoon series, the mystery of the stolen diamond was solvable by the clever detective duo.