2 Ugly Sisters/Stepsisters in Cinderella
10 Christmas cards in a set of cards
23 Pairs of Chromosomes (in a Human Body)
I reckon it's likely to be Turn of The Century
2 covers on a book
300 Length of Noah's Ark in Cubits
6 Correct numbers to win the lottery
2 Point Four Children
31 Ice Cream Flavors at Baskin-Robbins
2 Point Four Children
63 Days Gestation for a Cat - The domestic cat has a nine week pregnancy. :o)
52 cards in a deck without the jokers
The letters "T you C W 2" in a ditloid puzzle represent the phrase "Two you can see with." Ditloids are puzzles where a phrase is represented by its initials and numbers, and in this case, the "2" indicates the word "two" in the phrase.