No way to report problems
There are mistakes in the clues and the website does not provide any way to report them.
One clue "Ben didnt go to the outdoor camp on the 26th" should be written as "On the 26th Ben didnt go to the outdoor camp." The solution has the outdoor camp on July 5th.
It is very difficult to solve these when proper rules of English grammar and writing are not followed.
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LogiGrid Logic Problem Puzzles, v1.0.1