गणित की कक्षा में मुक्त अंत वाले (open-ended) प्रश्न पूछने के संबंध में निम्नलिखित में से कौन-सा/से कथन सत्य है/हैं? (a) यह छात्रों को अभिसारी चिंतन कौशल (convergent thinking skills) को सुधारने में मदद करता है। (b) यह आलोचनात्मक चिंतन कौशल (critical thinking skills) को विकसित करता है। सही विकल्प चुनिए।

A mathematics teacher of Class II gives the following word problem on addition to the students: 'A bag contains 4 mangoes and 6 more mangoes are put into it. How many mangoes are there in the bag in total?' This type of word problem belongs to which of the following structures of addition?

A teacher wrote the number 308 on the blackboard and asked the children to read it aloud. A child said, 'It is thirty-eight.' Which of the following is the most appropriate strategy to rectify the error made by the child?