This is a 3.5-star Shikaku puzzle, with the Unknown twist. That is, some numbers have been replaced by question marks. Each question mark stands for a number other than zero.
There, a new puzzle. Guess the theme. Hint: Convert the numbers to letters.
As I said in Puzzle 033, I will post more Unknown puzzles. This is one of them.
Tomorrow I will be back to school. That means, wasted time at school
will might be used to make puzzles.
However, I also have some bad news. In September, I have a math competition that is very important to me, so I need to study/learn/practice more often. This means I might not be able to update this blog at the same rate as before. Moreover, at 11th grade, things start to get serious; I might need to dedicate more time to school. So…sorry for the inconvenience due to the irregularity of my (upcoming) schedule.