Exactly four of these statements are false, because only one statement can be true.
These kind of texts are self-descriptive.
Here are a two self-descriptive sentences by Lee Sallows:
This
pangram
contains two
hundred nineteen
letters: five a's, one b,
two c's,four d's,thirty-one e's
eight f's, three g's, six h's,
fourteen i's, one j, one k,
two l's,two m's,twenty-six n's
seventeen o's, two p's, one q,
ten r's, twenty-nine s's,
twenty-four t's, six u's,
five v's, nine w's,
four x's,five y's,
and one
z.
And in French:
trois a,
trois c, trois d,
neuf e, quatre f, deux h,
neuf i, six n, quatre o, deux p,
cinq q, six r, sept s,
huit t, neuf u,
cinq x
See Fatrazie if you want more.
The usual way to solve such a problem is to go step by step: fill in the gaps with what you counted in the previous step, and eventually, if there is a solution, you will find it.