Inquiry Submission By Seo K

Hello everyone, i am a back packer going to cambodia in 2 days. I have about 10 bill of 2006 serie 100$ left with me after all the travel. So my question is:

1. Will i have problem using them ?

2. Will i have problem changing them for other currency at a currency exchange booth ?

Hope to get help soon. Im so worried because tbay is what i got