Log in
Email
Password
Register
Menu
Free Stock Photos
Newest photos
Popular photos
Contribute
Submission guidelines
Photographer signup
Photographer login
About
About Freerange
Image license
API
Contact us
Support
Contact support
FAQ
Login
Login
Register
Search all
Photos
Illustrations
Match All
Match Photo ID
Newest
Popular
Select Category
Editorial and News
Animals & Insects
Architecture
Architectural Details
Arts & Music
Backgrounds & Textures
Business & Office
Cities and Modern Life
Illustrations
Interiors
Flowers and Plants
France
Food & Drink
Health and Fitness
Holidays & Occasions
Industry & Agriculture
Landscapes & Nature
Letters and Numbers
Objects
Other
Military
People
Signs & Symbols
Sky and Clouds
Space
Sports & Recreation
Technology
Travel and Vacation
Transportation
Vintage Photos
Sponsored images from iStock
View footage results
Click to save 15% sitewide with code
FREERANGE15
View More
119 free solve photos from Freerange
Filter results
Popular
Most Viewed
Newest Photos
All licenses
Freerange
CC0
Photos & Illustrations
Photos
Illustrations
Per Page
25
50
100
Hand creating a lightbulb with green tree - Ecology and life con
Hand creating a lightbulb with green tree - Ecology and life concept
Little girl writing on blackboard - Learning and knowledge conce
Little girl writing on blackboard - Learning and knowledge concept
Exchanging Ideas - Argument and Debate Concept
Exchanging Ideas - Argument and Debate Concept
Abstract Person with Cogwheels Thinking Fast and Slow - With Cop
Abstract Person with Cogwheels Thinking Fast and Slow - With Copyspace
mental health Silhouette
Silhouette of head with puzzle piece missing. The human brain is complicated.
Thinking Person - Thinking Fast and Slow - Retro Design with Cog
Thinking Person - Thinking Fast and Slow - Retro Design with Cogwheels
key to questions answer
Illustration of questions and hand holding the key to the answers
Businessman with lightbulb head - Thinking process and ideas in
Businessman with lightbulb head - Thinking process and ideas in a business context
Businessman finding a solution to a problem
Businessman finding a solution to a problem - The way out of a labyrinth
Businessman having an idea - Problem-solving in a business conte
Businessman having an idea - Problem-solving in a business context
Expressing Doubts - Interrogation Marks - Hand Drawing a Person
Expressing Doubts - Interrogation Marks - Hand Drawing a Person Having Doubts
Two little girls writing on a blackboard with science subjects
Two little girls writing on a blackboard with science subjects - Learning, knowledge and education concept
Problems Solutions Sign Means Difficult Situation And Complicati
Problems Solutions Sign Indicating Tight Spot And Snag 3d Rendering
Thought Concept with Light Bulb Over Blackboard
Thought Concept with Light Bulb Over Blackboard
Concept of Work - A Person Drawing Cogwheels
Concept of Work - A Person Drawing Cogwheels
Green lightbulb brain - Green concept
Green lightbulb brain - Green concept
People solving a problem
People solving a problem - Business solutions and teamwork concept with hands and jigsaw
Hand and lightbulb - Creativity and ideas concept
Hand and lightbulb - Creativity and ideas concept
Teamwork - Team Building Jigsaw - With Copyspace
Teamwork - Team Building Jigsaw - With Copyspace
Question Mark In Maze Shows Confusion
Question Mark In Maze Shows Confusion And Puzzled
team building
Illustration of putting a team together. Building a business team is like assembling a jigsaw puzzle.
Brain as black lightbulb - Creativity concept
Brain as black lightbulb - Creativity concept
Joining the dots - Problem-solving concept
Joining the dots - Problem-solving concept
Having Doubts - Drawing of a Man on Blackboard - Illustration
Having Doubts - Drawing of a Man on Blackboard - Illustration
Questions and Doubts
Questions and Doubts
Find even more royalty free stock photos from the world's best photographers
View
of
5
Try your search on iStock: