Thinking Skills: Critical Thinking and Problem Solving

3.9 Spatial reasoning 115 6 Some children are making decorations. A square sheet of paper is folded along a diagonal and then ...

116 Unit 3 Problem solving: basic skills 3.10 Necessity and sufficiency Another type of problem involves identifying whether the ...

3.10 Necessity and sufficiency 117 found. Having the skill to know which pieces of data are needed can save considerable time an ...

118 Unit 3 Problem solving: basic skills assistant to count the bags. However, the assistant, not being very bright, counted the ...

3.11 Choosing and using models 119 The current structure of income tax collection in Bolandia is that the first $2000 of annual ...

120 Unit 3 Problem solving: basic skills mathematics. What effect would these changes have on someone earning $50,000 a year? As ...

3.11 Choosing and using models 121 Commentary If we just look at the data as it stands the pattern is not clear, other than that ...

122 Unit 3 Problem solving: basic skills 2 Finn walks to school, a distance of 1.5 km which takes him 15 minutes. His older s ...

3.12 Making choices and decisions 123 3.12 Making choices and decisions decisions 3.12 A is 2 × $1.29 = $2.58 for 300 g B gives ...

124 Unit 3 Problem solving: basic skills Summary • We have seen how problems may involve making choices and decisions. • Dec ...

3.12 Making choices and decisions 125 4 The country of Danotia prints stamps in the following denominations: 1¢, 2¢, 5¢, 9¢, ...

126 Unit 4 Applied critical thinking 4.1 Unit 4 Applied critical thinking Inference The verb ‘infer’ means to draw a conclusion, ...

4.1 Inference 127 Commentary We’ll consider the inferences in turn. The first one, A, as well as being a bit vague, has little s ...

128 Unit 4 Applied critical thinking Why do we use the word ‘safe’? The practice of calling some inferences unsafe is a recognit ...

4.1 Inference 129 Commentary Although the passage has a somewhat negative tone it is not openly judgemental in what it claims. W ...

130 Unit 4 Applied critical thinking Note that even if there were statistics showing that since lawyers started advertising, mor ...

4.1 Inference 131 quite trivial car accidents. The writer Andrew Malleson wrote a book called Whiplash and Other Useful Illnesse ...

132 Unit 4 Applied critical thinking Commentary The first point to make is that the data concerns public opinion. The first of t ...

4.1 Inference 133 putting in false claims, and that would explain the rise in the number of claims generally. These are plausibl ...

134 Unit 4 Applied critical thinking claims. But even if that widespread belief (shown by Chart 2) is unfounded, it is not becau ...