100 zeroes in a googal... the 'q' is a typo for a 'g'
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x and y are complementary so x + y = 90 and so y = 90 - x z and q are complementary so z + q = 90 and so q = 90 - z x = z so 90 - x = 90 - z that is y = q
q
We use Q for Rationals... which is repreentative of Quocentia (Quotient), since rationals are RATIOs or fractions.
Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
2 and 4 are grades (chemistry) according to ASTM A487 N and Q likely stand for normalized and quench/temper, but not 100%.