Mathematics is not only a language of tough equations and logic, it has a real beauty of thinking, and Puzzles and Recreational Mathematics is the best way to explore the deepness of mathematics.
What is the next letter in the sequence, Y, B, W, D, U, F? S - It is based on every other combination of the letters of the alphabet coupled from the end and the beginning. Z,A and X,C, and V,E are omitted - T,G should be, so the next combo shown is S,H. To keep awake driving late at night much earlier in life I learned to say the alphabet backwards in my head and then alternately like this from the ends in and the middle out, so I recognized this quickly.
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