I am a two-digit number, I am a multiple of 5, I am an odd number, and the sum of all my factors is 31. How old am I?
我是一个两位数，我是5的倍数，我是奇数，我所有因数的和是31．我是几呢？
<gadget id="calculator">31 - 1 - 5</gadget>
<output>25</output>

<result>25</result>