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5. analysing and solving questions five steps to solve the exercises before start solving the questions, let us review the approach to numerical reasoning tests that we explained at the beginning of our book, by listing the following steps: 1) read very carefully the statement of the question. 2) identify the relevant data in the tables and charts. 3) look at the answer options (check if you can use rough estimations). 4) choose the method for your calculations (applying percentages, rule of three, equation, intuitive approach…) 5) perform the calculations and match your result against the options. next, we will show our method to solve every exercise with a detailed explanation, including its potential 'shortcuts' and 'pitfalls', as well as my advice on the calculation process that could be useful for you to face other similar questions in your tests.
exercise 10 in a selective course organised by the eu police agency, europol, there are two classes: a class for non-commissioned officers (nco), in which there are three women for every five men, and a class for officers, in which there are as many women as men. having into account the information collected in the chart, what can be said about the average size of the candidates? average size of candidates (cm) 182 180 - 178 - 176 - 174 172 - men women 170 - 168 - 166 - 164 nco officers a) it is smaller in class for nco than in class for officers. b) it is higher in class for nco than in class for officers. c) it is identical in both classes. d) the average size of the men is 179 cm in the two classes together. e) the average size of the men exceeds the average size of the women by 9 cm in the two classes together.