MUSIC THEORY FUNDAMENTALS - Chapter 3, Exercise 1 Solution
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Building the G Major Scale

PROBLEM
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Using the real W-W-H-W-W-W-H major scale pattern, build the G major
scale starting on G, and identify which single note requires a sharp.

SOLUTION
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Starting on G and applying the pattern one step at a time:

    G --(W)--> A --(W)--> B --(H)--> C --(W)--> D --(W)--> E --(W)--> F# --(H)--> G

Checking each step against the white-key piano layout:
  G to A = whole step (correct, no adjustment needed)
  A to B = whole step (correct, no adjustment needed)
  B to C = half step (correct - B and C are naturally a half step apart)
  C to D = whole step (correct, no adjustment needed)
  D to E = whole step (correct, no adjustment needed)
  E to F = only a half step naturally, but the pattern requires a WHOLE
           step here - so F must be raised to F# to make E-to-F# a
           genuine whole step
  F# to G = half step (correct once F is sharped)

ANSWER: The G major scale is G-A-B-C-D-E-F#-G. The single note requiring
a sharp is F (raised to F#).

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WHY THIS WORKS AS AN ANSWER

This matches Chapter 3's own real key-signature table directly: G major
is listed with exactly 1 sharp (F#). The reason only F needs adjusting
is that every other adjacent pair in the G-A-B-C-D-E-F-G sequence already
matches the required W-W-H-W-W-W-H pattern using natural (white-key)
notes - only the E-to-F step, which is naturally a half step, needed to
become a whole step to fit the 6th position of the pattern, requiring F
to be sharped.