निम्नलिखित में से कौन सा गणितीय तर्क मूर्त (ठोस) उदाहरणों से अमूर्त सिद्धांतों की ओर बढ़ता है?

The setting up of Mathematics Clubs in schools was prominently recommended by which educational policy document?

Which basic mathematical concepts can be effectively developed at primary levels through the use of Dominoes?