Explanation : (B) There are numerous approaches to solve math problems, which includes drawing a picture, questions and check, work backwards, systematic listing and logical reasoning. Mathematics is not a subject of rote learning. It is rather a subject of conceptual understanding.
Explanation : (C) According to Piaget, when the child is at formal operational stage, it is appropriate to introduce ratio and proportion as at this point of development, thinking becomes much more sophisticated and advanced.
Explanation : (C) Interdisciplinary approach gives practical shape to the knowledge of various subject. So, the given problem is interdisciplinary in nature.