Question

1. Mattie's first wish came true in 2001.

2. Mattie's first wish was realized in 2001.

(Are both the same?)

in 2001
3. in two thousand one
4. in twenty one.
5. in twenty o one.
(Which reading is OK? Do you have other kinds of reading?)

Answer 1

Both sentences mean the same thing. In writing, we never BEGIN a sentence using numerals, but within the sentence, it's best to use them if it takes a lot of words to spell it out. In this case, 2001 is correct in writing the sentence. And, in speaking, we would say two thousand one.