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How many letters are in the German Alphabet?
There are thirty letters in the German alphabet. The first 26 are the same as the English alphabet, however they may be pronounced different. There are four extra letters, one of which is called the Esstsett.
How many 3-letter code words are possible using the first 8 letters of the alphabet if adjacent letters cannot be the same?
The answer would be 210
How many passwords are possible using the twenty-six uppercase letters of the alphabet without repeating letters for a 3 letter password?
26 x 25 x 24 = 15600
How many 4 letter combinations containing 3 consonants and 1 vowel can be made from this set if all the letters reload in a combination must be unique?
Assuming the mathematical definition of "combination" (ie unordered sets) and the standard 26 letter Latin Alphabet as used by English: There are 5 vowels and 21 consonants, giving: For each vowel: a choice of 3 consonants from 21, giving 5 x 21 C 3 = 5 x (21x20x19)/(3x2x1) = 6650 combinations [Other languages have different size alphabets and different vowel/consonants (eg Welsh, which uses the Latin Alphabet characters, has 7 vowels and 23 consonants.)] If you have a subset of the full Latin Alphabet, or another Alphabet, then you'll need to supply the set of letters for which you wish an answer.
What letters of the alphabet consist of only a line segment perpendicular to a pair of parallel line segments?
The letter - H
