This is a very nice, quick teaser I got from the site brilliant.org. Should be fun to do for the younger lot, no specific knowledge required for this one.
Place integers from 1 to 9, once each, into the 9 squares above, such that the horizontal row sums to 30 and the vertical column sums to 22.
What number would you place in square X?
As always, please send your answers directly to me at firstname.lastname@example.org. If you like the puzzle, please share it with others. If you have interesting puzzles to share, please send them to me at my e-mail given above.