**Corrigenda of the 2016 AD Edition**

SET 40, Q1. Correct Answer: E

Reasoning

We need to calculate the total amount of fat consumed and then calculate the daily consumption.

Calculation

We need to work out the total amount of fat consumed, which is the amount per person (both saturated and unsaturated), multiplied by the number of people. This gives:

(2.44 + 2.19) × 60120 = 278356 This is now in kg/year and we want the daily rate, so we divide by 365 days/year: 278356 / 365 = 762.6 kg/day

You must be careful at this point not to think you have finished the question and mark option B as the correct answer, because you still have to correct the order of magnitude. The population is in thousands so we need to multiply by 1000, giving us 762600 kg per day. The answer options expressed in kg are much lower figures than this, but if we divide by 1000, to convert kg to tonnes, we get 762.6 tonnes, which is option E.

**Corrigenda of the 2016 AST Edition**

– Question 13 (page 49): instead of options, it directly gives the answers.

Correct questions:

A. The bridge above a valley in the Shiniuzhai National Geological Park was entirely rebuilt to make it safer than the original wooden bridge.

B. The Shiniuzhai National Geological Park’s bridge and the bridge in the Zhangjiajie Grand Canyon area are designed by architect Haim Dotan.

C. China is the only country to build features like these dizzying structures.

D. The bridge above a valley in the Shiniuzhai National Geological Park is 300 metres long and made of glass panes that are 24mm thick.

**Corrigenda of the 2015 AD edition**

Abstract reasoning question 109: owing to a printing error in some copies of the book, the shading of the dark and light squares cannot be easily distinguished, making the answer difficult to follow.

**Corrigenda of the 2015 AST edition**

– Numerical Reasoning, Set 17 Q2: the answer given is correct (A), but the calculation under Saudi Arabia should say 8800/2250 = 3.9 (rounded) not 8800 / 2150 = 4.1. This does not affect the actual answer.

– Numerical Reasoning, Set 7 Q1: the answer is a typo as it should read 368.6 * 0.081 * (0.281 – 0.272) = 0.269 instead of 868.6 – it does not affect the question or the answer, though.

– Numerical Reasoning, Set 8: if you add up all the Miscellaneous 2011 expenditures in the pie chart (888 thousand EUR), this does not correspond to the table next to it which states miscellaneous 1092 (thousand EUR). It does not affect any question, however.

Corrigenda of the 2013 AD & AST editions

We are proud to let you know that no mistakes have been found in either of the two editions of 2013.

**Corrigenda of the 2012 AD edition**

– On page 156, in the paragraph starting with “Answer B has a smaller number …”, 10% of 32 million should read “circa 3 million, or exactly 3.2 million” and so on with the rest of the figures until the end of the exercise which should be multiplied by 10.

– On page 179 (and on page 199 where the explanation is), the answer to question 92 is A and not D. The figure 8.000 (answer D) is the number of cars in households with 4 cars, but the question refers to the households, therefore 8000/4 = 2000 is the correct answer.

– Answer 43 in the Numerical Reasoning chapter, “Thus, 100*((28.7/(4187*1.0185))”, it should read “Thus, 100*((28.7/(4187*1.018^5))”

– Answer 62 in the Numerical Reasoning chapter, “This gives 100*((6444/(2292*0.9952))…”, it should read “This gives 100*((6444/(2292*0.995^2))…”

**Corrigenda of the 2012 AST edition**

– Page 187, question 26: both answer D and E are correct

– Page 315, question 53: answer should show D and not E

– Page 213, question 8, rule 3: “clockwise” should be “counterclockwise”

– Page 214, question 54, rule 2: should read as follows: “In every odd turn, the circles in those eggs are *unshaded* where the number of circles is also odd. In every even turn, the circles in those eggs are *unshaded* where the number of circles is also even.”

– Page 250, question 57: the right answer should be A not E

**Corrigenda of the 2011 AD edition**

* We apologise for the errors. We will make sure to significantly improve our quality control for future editions.*

– Page 51: answer D is missing from the sample table, though visible a few pages afterwards. It reads “D. Skopje’s concrete blocks represent the legacy of rebuilding after the destruction of World War II.”

– Page 55: in the section “Correct versus Incorrect Statement” in the first sentence it should read “Administrator” (not Assistant)

– Page 58: under the heading “Frequency” the word “meanwhile” appears twice

– Page 100 and 103: questions 93 and 101 are identical

– Page 148: the second bullet in the Mental calculus section is the repetition of the first

– Page 163: question 13 answer D should be “27.62%”, therefore the same amount should be in the explanation on page 192

– Page 168: one line from the table on question 33-35 is missing, and it should contain two data for Ukraine such as 46936 in the 1st column (population) and 8401 in the 2nd column (no. of students)

– Page 169: question 35 answer B should be “48 euro”

– Page 169: question 36 should read as follows: “If 21.4% of the Danish population is

under the minimum age to marry, what percentage of the eligible population (i.e. over the minimum age and unmarried) got married in 2005, if Danes only married other Danes?”. Also, answer D should read: “12,2%”

– Page 171: question 44, answer B should be “Up 278,000” instead of “Up 285,000”; see comment for explanation on page 195

– Page 176: the 1st column of the table on top of the page should have “thousands” instead of millions

– Page 176: the table for questions 75 and 76 should read “2005” as the “student population in 2005” instead of “2007”. Also, question 75 should read: “How many females were in tertiary education in Luxembourg in 2005?”

– Page 178: answer A for question 89 should be “6.6 million”

– Page 183: the 3rd column caption in the table for questions 115-117 should simply read “3” instead of “3+”. Figures in the last two columns for these questions are adjusted

Question 116 rewritten to reflect the above changes, as follows:

“How many people in the UK own 4phones or more?

A. 320784 B. 602610 C. 1172340 D. 507320 E. 52000

– Page 183: question 117, answer E should be “3.86 million”

– Page 184: the bar chart for the Netherlands for questions 121-123 should have the figures “224” for 2004 and “254” for 2006 and “273” for 2005

– Page 186: answer A in question 128 should be 348 instead of 258, and the question should be rephrased as follows: “How many fewer heart attacks would Serbia have needed to record to have exactly one third of all recorded heart attacks in the countries listed in the table?”

– Page 190: question 149 should read “If the number of families in Poland decreases by 15000 each year, …”

– Page 191: question 2 explanation should have a superscript, so instead of “5481*1.0025” it should read “5481*1.002^{5}“; similarly for question 5 explanation, instead of “41.87*1.0022” it should be “41.87*1.002^{2}”

– Page 192: question 16, “The amount of Switzerland’s gold reserves changed from (…) to 1054 tonnes”, this should read “1040 tonnes”

– Page 193: question 19 – last line should read “100 * (59/3111 x 1.003^{2})”

– Page 194: answer 35 explanation should read “take the total of secondary students in each country (35.2% of all students) and multiply by the spending per student, then divide by the total population to get how much the per capita spend is. The answer is therefore (((56*0.352)*6062)/

– Page 194: answer 36 should read: “In Denmark there were 22481 marriages in 2005. Multiply by 2 to get the number of people that married (44962). The number eligible for marriage is 28.2% (unmarried) less 21.4% (under the age) of the

population (6.8% of 5417000) which is 368356. The percentage who married is (44962/368356)*100 = 12.2%”

– Page 194: question 37 explanation is missing a “-” sign between “((47124/9978)-(48391/10078))”

– Page 194: question 40 explanation is missing a “-” sign between “((542/43060)-(537/(43060/0.998)))”

– Page 195: question 44 explanation should read “In 2005 there was 1 policeman for every 138.97 of population (58645/422 = 138.97). In 2010 there were 424 thousand policemen so the population was 138.97*424000 = 58.923.000. The increase in the population was therefore 58.923.000-58.645.000 = 278.000”

– Page 196: question 62 explanation should read 2292 x 0.9952 (with a superscript 2, instead of 2292 x 0.9952)

– Page 197: question 67 explanation should read “61899” instead of “60098” for the UK instead of the figure for Italy, but the answer and the rest of the explanation remain valid

– Page 199: question 89 explanation should read “Cable broadband users increased by 121.4% (2987-1349=1638 => 1638/1349*100=121.4). In 2015 there will therefore be 2987+2987*121.4% = 6613 (thousands)”

– Page 199: for question 95 the correct answer is B

– Page 199: question 97 explanation should not have a “/” but a “-” sign in between “((6842/(7441+30))-(6939/(7441-30))”

– Page 201: answer 116 should read “99% of the population own 0-3 phones (17.2+79.6+2.0+0.2). 1% of the population of

60,261,000 is 602,610”

– Page 201: answer 117 figure should read “58645” instead of “58545”

– Page 202: answer 127, second line should read “one year” instead of “one week”

– Page 202: answer 128 should be replaced with the following: “Let the number we are looking for be X, then: X = (4748+5014+8128+6042+X) / 3 which is 3X = 4748 + 5014 + 8128 + 6042 + X which is 2X = 4748 + 5014 + 8128 + 6042 therefore X = 11966 This is (12314 – 11966) = 348 fewer heart attacks than the real number in 2005.”

– Page 204: answer 149 is missing a number “4” from 572 which should read 5724 in the first part of the equation

– Page 221: question 18, in answer B the liquid (and therefore the bubbles) should be “invisible”

– Page 222: question 20, in the 2nd image, the bottom right circle should be unshaded – the question/answer/explanations remain fully valid nevertheless

– Page 225: question 29, in the correct answer (E), the petal in the bottom left should be flipped back to its original position, that is, its tip should be pointing inwards

– Page 225: question 30 – in the 3rd and 4th image, the middle triangle should be rotated by 90º so that its right angle points diagonally away from the small circle. This nevertheless does not change the outcome of the exercise and the answer remains valid.

– Page 238: question 70 – in answer E the circles in the eggs should be four, one, two and three respectively and the four circles in the first egg should be shaded

– Page 247 and 259: question 96 – the correct answer is A instead of B

– Page 250: question 13, the correct answer is B: the plant first moves 4 steps to the “right” so it ends up in the middle column, then moves 5 steps, then 6, then 7 and the last one will be moving 8 steps which is answer B

– Page 250: question 18, rule 1 is not respected in the answer A since the flask should turn 45 degrees clockwise instead of 45 degrees counter-clockwise. The correct answer is therefore B with the above correction (the liquid and therefore the bubbles should be “invisible”)

** Corrigenda of the 2011 AST edition
**

– Page 42, 9 lines from the end of the page, at the frequency indicators the word “meanwhile” is mentioned twice in the same line

** Corrigenda of the 2010 edition
**

– Page 26: the rule according to which scores must be reached in each of the admission tests, may have exceptions as is the case in the linguist exams where abstract and numerical reasoning scores are combined and counted as one single item

– Page 73: question 46, answer B should not include “and climate change”

– Page 73: question 47, answer D should not include “only”

– Page 74: question 50, answer B can be more precise if read as “Many European politicians see the European Union…”

– Page 88: question 83, answer B should read 5 million instead of 50 million

– Page 92: question 92, answer B should be Cannot tell

– Page 93: question 94, answer C is cannot tell; answer E should read was instead of is

– Page 94: question 96, the spelling of Yulia Tymoshenko should read the same in all answers

– Page 104: the rule of having X-Y digits does not hold, text has been redrafted (please see at the bottom of this section the new text)

– Page 109: the number 66 in the outer curve of the pie chart should be 76; looking at the diagram is a valid way only if totals on each segment are in absolute terms the same or the segments are in percentages with each of the rings representing 100%

– Page 117: question 24 can be more precise by adding “if the unemployment rate is 2% *of the total population* in …

– Page 127: question 80, answer D should read 3.7 and all other answer should have a decimal after their first digit (2.42, 2.51 etc.)

– Page 130: the upper table has no caption, it should read Tax revenues in various OECD countries (percentage of GDP)

– Page 146: another interpretation of the sample odd-one-out could be that answer F is only convex form whereas all others are concave – note that no such odd-one-out question will be used for the real EPSO exam, these are only for practice purposes to improve your methodology skills

– Page 152: same idea of convex-conclave can be used for the bottom left figure

– Page 158: question 12, dolphin A should have only black belly not black and white, this is a printing/drawing mistake

– Page 163: question 32, answer A may also be considered as the odd one out given the lack of any triangle in the middle

– Page 169: question 55, there are other alternative answers such as B (all but one figure have at least two horizontal lines) or F (all but one figure have at least two parallel lines)

– Page 170: question 59, figure C may also be considered as the odd one out for being the only one that does not contain any angles

———-

Page 103-104 new text:

Order of Magnitude

An order of magnitude is a scale of amounts where each amount is in a fixed ratio to the amount preceding it. The most common ratio is 1:10, which means that the next amount in a scale can be calculated by multiplying the previous figure by 10.

For example:

1 — 10 — 100 — 1000 — 10000 …and so on…

If we look at the above answer options, we will realize that that is exactly the situation we have here: the only difference is that the smallest number is rounded and the order is reverse:

543,500 — 54,350 — 5,435 — 543.5 (rounded to 544) …and so on…

When we are faced with a set of numbers like the ones above, it will give us an important hint that the actual calculation of the figure is not really necessary – all we need to figure out is the order of magnitude of the correct answer.

Let us consider again the above question from the perspective of whether we can take advantage of this observation. We pick up from the point where we converted the GDP figure to thousands: 375,000,000

The next thing we did was to calculate the value of the oil revenue: 375,000,000 * 0.4 = 150,000,000

The next step would be to calculate the per-capita oil revenue figure: 150,000,000 / 27601

This can be simplified to: 150,000,000 / 28,000

We then reduce these figures by eliminating as many as possible of an equal number of zeroes on each side of the calculation, which leaves us with 150,000 / 28

We now put aside the three zeroes in 150,000, which leaves us with 150 (but remember that we will need to bring the zeroes back later). This process, called reducing numbers to significant digits, leaves us with 150 / 28 (or roughly: 150 / 30 = 15 / 3 =5).

We now have to bring back the three zeroes set aside, which turns 5 into 5,000, a four-digit number. This in turn tells us that the correct answer has to be a four digit number, i.e. greater than 1,000 less than 10,000, which in this case is 5,434.58.

Let us summarize this short cut:

• When doing calculations involving large numbers with lots of zeroes, we need only concentrate on significant digits (digits other than zero).

• When looking at the order of magnitude, we need only define the range within which the result will fall, i.e. the number of digits as in ‘greater than 1 less than 10 (one digit figure) or greater than 10 less than 100 (2 digit figure) or greater than 100 less than 1,000 (3 digit figure) and so on

• Always be mindful of the zeroes you set aside and remember to add them back at the end.

• If the large figures given contain no zeroes (eg. 365,174,234.44), then round the figure up or down to the nearest easily managable figure (e.g. 365,000,000).

Remember, in order of magnitude questions, it is not the resulting figure but merely the number of digits in the resulting figure you need to establish to get the right answer..