Abstract heads with question marks and exclamation marks on school blackboard
Canon EOS 70D 1/40s, f 4.0, ISO 1600, 31 mm
License: CC0 Public Domain
Gerd Altmann has released this “Next Problem” image under Public Domain license. It means that you can use and modify it for your personal and commercial projects. If you intend to use an image you find here for commercial use, please be aware that some photos do require a model or a property release. Pictures featuring products should be used with care.