We suggest that you do not look at the solution until you've spent a while trying to solve it on your own.
Some puzzles are self-correcting.
By this we mean that you'll know if you've got it right from the puzzle itself. For example, in the magic square puzzle, you can see when the columns, rows, and diagonals all add up to 15. In some cases, there may be more than one solution to a given puzzle. We'll provide one, and you can search for others.