In the early stages, there may be no symptoms associated with hip impingement or symptoms may be mild or vague. 1  Some typical symptoms include: 2  Stiffness in the thigh, hip, or groin. 3  The inability to flex the hip beyond a right angle.
The framework of Singapore Math is developed around the idea that learning to problem-solve and develop mathematical thinking are the key factors in being successful in math.
Singaporean high-school students were presented with this logics problem in their Singapore and Asian Schools Math Olympiad test paper last week. Albert and Bernard just become friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates.