I need 3 different names for the number 15 and 999

simple: translate

nine hundred ninety-nine into three languages...
negenhonderd negenennegentig in Dutch

then translate fifteen into three languages.

http://babelfish.yahoo.com/translate_txt

fifteen,10+5,5*3=15.nine houndered,ninety nine,900+90+9,333*3=999

Sure! Here are three different names for the number 15 and 999:

For the number 15:
1. Fifteen: One way to name the number 15 is by using its standard name.
2. Decadepent: Another way to name 15 is by using a base-10 multiplicative numeral system, where decadepent signifies 1 five and 5 ones.
3. Quindécuple: In French, the word "quindécuple" represents the number 15.

For the number 999:
1. Nine hundred ninety-nine: This is the standard name for the number 999.
2. Seven hundred seventy-seven plus two hundred twenty-two: 999 can also be explained as the sum of 777 and 222.
3. Novencentnonagintenneun: In German, the term "novencentnonagintenneun" is used to represent the number 999.

To find different names for numbers, you can use various numeral systems, languages, or mathematical operations to represent them uniquely.