How are cross-number puzzles similar to crossword puzzles?

Cross-number puzzles are structurally similar to crossword puzzles in that they both utilize a grid-based format where entries intersect or interlock with one another.1

In both types of puzzles, the solver is provided with a diagram containing numbered squares and two corresponding lists of clues—one for horizontal entries and one for vertical entries—where the numbers in the lists correspond to the starting positions in the grid. While crossword puzzles require the insertion of letters to form words, cross-number puzzles replace these words with numbers, requiring the solver to deduce the correct numerical sequences based on the provided clues.12