Fifty (noun)

The cardinal number that is equal to 5 × 10.

Origin:

From middle english fifti, fifty, from old english fīftig, from proto-germanic *fimftig (“fifty”), from *fimf (“five”) + *-tig (“group of ten”).

Examples:

1. I have fifty dollars in my wallet.
2. The temperature outside is fifty degrees Fahrenheit.
3. She owns fifty pairs of shoes.
4. The library has fifty copies of the book.
5. The store is open from nine to fifty.