Morse Code Numbers
Every digit is five signals long. 0 is five dashes. 1 starts with a dot then four dashes, 2 two dots and three dashes, and so on until 5 (five dots). From 6 the pattern flips: dashes move to the front.
That five-unit length is a useful clue when you are learning how to read Morse. If a group is clearly longer than most letters, it is often a figure. Combine numbers with the alphabet to send times, years, or a short code such as 12345.