1. Wrong: I bought 10 pies, 6 doughnuts, and 200 gummy worms during the time I lived at 11 Interlaken Road.
Better: I bought ten pies, six doughnuts, and two-hundred gummy worms during the time I lived at 11 Interlaken Road.
Explanation: Only the number on this address should be written as a number.
2. Correct: Jackie's 137 home runs and Michael's 2186 dunks make them stand out forever as greats.
Explanation: Both of the number in this sentence use more than two words to spell out, so can be left in numerical form.
3. Wrong: Between 10 and 15 kids each year go on semester programs.
Better: Between ten and fifteen kids each year go on semester programs.
Explanation: These numbers each need one word to be spelled out, so should be spelled out.
4. Wrong: 100 percent of the kids on that team plan to play in the WNBA.
Better: One hundred percent of the kids on that team plan to play in the WNBA.
Explanation: The first word in a sentence can't be the numerical form of a number.