“…Problems are tasks that are solved not just by direct effort but also by play or some creative insight (Holton, 2009;Liljedahl, SantosTrigo, Malaspina, & Bruder, 2016). Problem-solving has been regarded as an important aspect of mathematics, and the teaching and learning of mathematics for a long time (Liljedahl et al, 2016;Schoenfeld, 2007). The 1992 New Zealand mathematics curriculum document (Ministry of Education, 1992) refers to problem-solving as involving the use of interesting and realistic contexts that are personally meaningful to the learners; open-ended problems that do not necessarily have one solution; problems that yield solutions that require the use of more than one mathematical skill; problems that require searching for information; thinking; and "the systematic collection of data or evidence, experimentation (trial and error followed by improvement), flexibility and creativity, and reflection" (Ministry of Education, 1992, p. 11).…”