15 puzzle
Word Rarity
Rare
Frequency: 3.94 in modern English
26
Scrabble Score
6
Letters
2
Syllables
5
Unique Chars
Meaning
noun
A sliding-block puzzle with 15 sequentially numbered square tiles in a 4×4 frame, the aim being to arrange the numbers in order by sliding one at a time horizontally or vertically into the single available space.