Observation and Deduction Test for Scouts - Pioneer Sees Everything - Logic Puzzle

Test you powers of observation and deduction with this old picture from book for soviet boy scouts called pioneers. The pictures hides hints to answer all 9 questions, but you will have to deduce what is not plainly show. How many can you answer on your own? My score was 8 out of 9. On my channel you can find more puzzles with explanations and methods for quick mental calculations.