Bangs really confuse me:(

Question

Could I get a few notes on them please, I already checked the internet.

B stands for beauty
A stands for age
N stands for number
G stands for goodness
S stands for size

These are all adjectives, what confuses me is that are they supposed to come after the noun or before?

Answer 1

Clever! Unlike English adjectives, most descriptive adjectives in French FOLLOW the noun they modify.
une porte secrète
les vins blancs

Some short descriptive adjectives that usually precede the noun are:
beau (B for beauty)
jeune/vieux (A for age)
dernier/premier/plusieurs (N for number)
bon (G for goodness)
grand/petit/gros (S for size)
But there are others as well:
court/long
gentil
quelque/quelques
tel
tout (precedes the article = toute la maison)

Then there are adjectives that have two or more meanings, depending upon the position (after or before)

Sra (aka M me)
joli
mauvais
nouveau
vilain
autre
chaque

Answer 2

There are masculine forms, feminine forms, and plural forms as well right?

Answer 3

Absolutely! A good dictionary will help you. Take for example: bon
bon = masculine singular
bonne = feminine singular
bons = masculine plural
bonnes = feminine plural

beau = masculine singular
bel = masculine singular before a vowel (a, e, i, o, u)
belle = feminine singular
beaux = masculine plufal
belles = feminine plural

Sra (aka Mme)