Trudiehorse - I guess you don't read to see if there are any follow-up to your comments of puzzles being illogical? On this site, people are very helpful and supportive of encouraging the less-skilled puzzlers.
This, also, is a completely logical puzzle. At the end, the last 4 squares can only be filled in one way. Look what happens when the "3" is all the way to the left... it doesn't work. Look what happens when the "3" is all the way to the right... same problem. Therefore - by logic - it must be in the middle.
This, also, is a completely logical puzzle. At the end, the last 4 squares can only be filled in one way. Look what happens when the "3" is all the way to the left... it doesn't work. Look what happens when the "3" is all the way to the right... same problem. Therefore - by logic - it must be in the middle.
Entirely logical puzzle. Thanks to the creator!