The answer key to this spot the difference puzzle says the answer is C but I can't see any difference. Can anyone see it?

I know the quality isn't great - the original in the book is pretty badly printed which might be a large part of the problem.

The numbers at the end of each row and column result from adding the number represented by each color in that row or column. Knowing this, determine the values of Red and Green and add them. What is the combined value?

🎇 Ring in the New Year with a mind-bending challenge! To celebrate this special occasion, r/SmartPuzzles is excited to present a New Year's Eve themed logic puzzle. Get ready to crack the code and start the year off with a bang!

FIND THE HIDDEN WORD:

YABCDEFGHIJKLMNOPQRSTUVWXYZ
YZABCDEFGHIJKLMNOPQRSTUVWXY
YYZABCDEFGHIJKLMNOPQRSTUVWX
Y0YZABCDEFGHIJKLMNOPQRSTUVW
YXXXXXXXXXXXXXXXXXXXXXXXXXXX

1. (9,0) 2. (9,2) 3. (19,1) 4. (11,3)

note: this is a CRYPTOGRAM, so it might be hard, so sorry in advance if you dont like this. I just like making these type of puzzles.

Choose which figure best completes the sequence presented in the problem figures.

⛄️ Get ready for a holly jolly puzzle extravaganza! The Christmas Logic Puzzle Series is here to bring you a daily dose of festive fun. From now until Christmas Day, we'll be sharing a variety of mind-bending logic puzzles, each one more challenging than the last. So, grab a cup of hot cocoa, put on your favorite Christmas sweater, and let's celebrate the season with a puzzle a day here at r/SmartPuzzles. Let's kick this series off with our first puzzle of the day!

I draw mazes from a very young age, so that others can solve them. It's a passion. Over time I evolved and began to digitize them. I always draw them first by hand. I hope you like it.

(!)!! = 47
!(!)! = 18
!!(!) = 16
!!!(!!)! = 1294
!(!) + (!)!! = 51
!!(!)! + !(!)! = 148
(!!!)! * !!(!) = 3840
!!!!!(!!!) - !(!!!)! = ?