YUANTIKU: $15M to Beijing-based Yuantiku in a Series C round led by existing investors Matrix Partners China and IDG. Founded in 2012, Yuantiku offers a database of practice questions to students preparing for exams, adapted to each student’s performance. One-sixth of the students participating in China’s national college entrance exam this year--1.5 million users--prepared using Yuantiku, TechNode reports. Yuantiku will use the new funding to upgrade products and increase marketing and branding.