Correct

十五

/ shí wǔ /
Strokes

Definition

fifteen/15

Example

As a Numeral

fifteen

1
xīnli
心里
shí
十五
diàotǒng
吊桶
shuǐ
  
,
shàngxià
七上八下
  

Her heart clanged like fifteen buckets in a single well.

2
Shí
jiā
shì
shí
十五
  

10 plus 5 makes/is 15.

3
shí
第十五

fifteenth

4
Shí
十五
fēnzhī
分之

one fifteenth