I'm very new to these kind of methods, which i read about them only recently: hidden/naked pairs/triples/quads..

and i kinda jumped to deep water and trying to solve 5 sudokus combined.

tell me if im right, please. if im wrong, i'd like an explanation

in pic 1 BELOW: the LEFT block - is there a hidden quad of 2-5-7-9 in cells: 2, 3, 8, 9? which means i can rule out 2-5-7-9 in any other cell?

the digit 3 is being discovered in cell 5, therfore 6 is being discovered in cell 7. true or false?

in pic 1 BELOW: the RIGHT block - is there a hidden quad of 2-4-5-9 in cells: 1, 5, 7, 8? which means i can rule out 2-4-5-9 in any other cell?

the digit 1 is being discovered in cell 3, therfore the digit 6 is being discovered in cell 6 (no other 6 candidate) and 8 is being discovered on cell 9. true or false?

http://www.siz.co.il/my.php?i=mjvmmjilggze.jpg

in pic 2 BELOW: the LEFT block - is there a hidden quad of 2-5-8-9 in cells: 3, 4, 5, 9? which means i can rule out 2-5-8-9 in any other cell?

i only get the result of two digits (1, 4) in cells 7 and 8. true or false?

http://www.siz.co.il/my.php?i=a1jyjz0yeyey.jpg

in pic 3 BELOW: the SECOND row - is there a hidden quad of 2-5-8-9 again in row 2, collumns 4, 5, 6, 8? which means i can rule out 5, 9 in collumn 9?

the digit 6 is being discovered in collumn 9. true or false?

http://www.siz.co.il/my.php?i=mnct5nkty1in.jpg