इनमें से कौन सा/से सामान्यीकरण (generalizations) सत्य है/हैं? (a) 5 से छोटी कोई भी संख्या 10 से भी छोटी होती है (b) यदि कोई संख्या 3 का गुणज नहीं है, तो वह 6 का गुणज भी नहीं होगी (c) समान भुजाओं वाला कोई भी चतुर्भुज एक वर्ग होता 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?