一千个体积为1立方厘米的小正方体合在一起成为一个边长为10厘米的大正方体，大正方体表面涂油漆后再分开为原来的小正方体，这些小正方体至少有一面被油漆涂过的数目是多少个？

推荐阅读：
Company Blog Tips: How To Keep Your Company Blog Out Of A Rut　 10 Tips to Humanize Your Company Blog　 10 Communication Skills Every Blogger Should Hone　 Social Media Cheatsheet of Keyboard Shortcuts 2016 Edition　 Tanzania Plagued By Censorship, Offers Journalists A Course On D　 Young Cancer Patient Has Decided To Live-Blog His Health’s Decli　 How a CDN can be your Blog’s Secret Weapon　 Why Wasted Words Kill Good Ideas And Cost Sales　 Why You Need Niche Experience to Be a Great Blogger　 The Art of the Perfect Listicle