The clue "Speed-of-sound ratio" last appeared in the LA Times crossword on June 16, 2024. The correct answer for this puzzle is "MACH", a 4-letter word.
Solution MACH is 4 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is MACH with 4 letters, and the shortest is MACH with 4 letters.
No, "SPEED-OF-SOUND RATIO" hasn´t seen a spike right now. Solvers are most interested in: Composition, Smudge, asexual, COMING into being and ANNOYING KID.
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The solution is 4 letters long.