Number Series 

Instructions: Each number series question presents a series of numbers that you must complete by adding a new number. Find the rule which has been used to make up the series and apply this rule to complete the series correctly.  

Sample 1

8, 24, 12, 36, 18, 54, ?

  1. 90
  2. 16
  3. 27
  4. 62
  5. 162

Sample 2

7, 35, 105, 105 ?

  1. -105
  2. 0
  3. 105
  4. 175
  5. 35

Answer and explanation below.


Arithmetic

For the arithmetic questions, your task is to determine the formula for solving a problem and then to choose the correct formula among the five proposed. 

Sample 1

A raffle is being held between Jane, Jenna and June whose ratio of tickets is 4:2:1 respectively. If 15 tickets have Jenna's name on them, which formula can be used to determine how many tickets there are in total? 

1. 

2. 

3. 

4. 

5. 

Sample 2

An espresso machine can make 4 cups of cappuccino or 11 espresso shots in a minute and it takes the cashier an additional 20 seconds to ring up each customer. Which formula can be used to calculate how many minutes it will take to fulfill an order of 1 cappuccino and 1 espresso shot, 2 orders of 1 cappuccino, and 2 orders of 3 espresso shots and 3 cappuccinos?

1. 

2. 

3. 

4.  

5. 

Answer and explanation below


Similarities

In each similarity question, five pairs of words are given. Your task is to select from among them the pair that refers most directly to a single more general concept. Each member of the pair should be an example of this concept. 

Our recommendation to approaching such questions is to find the most direct definition to both words in a pair. For example, in the pair CUCUMBER - CELERY, both words can be defined as ,"green vegetables." If we are given the pair GUITAR - VIOLIN, we can define both words as, "instruments with strings." Try using this strategy to solve the following two sample questions.

Sample 1

1. DOCTOR - SURGERY
2. TEACHER- SCHOOL
3. SURGERY- BOOKS
4. DESK - CLASSROOM
5. DOCTOR - TEACHER 

Sample 2

1. TYPEWRITER - PEN
2. KEYBOARD - TYPEWRITER
3. PEN - PAPER
4. NEWS - PAPER
5. NEWS - KEYBOARD

Answer and explanation below.


Figure Analogies

Each figure analogy question consists of eight figures: figures X, Y and Z, and figures 1 to 5.

Figure X has been changed in some way to make figure Y. Figure Z has been changed in exactly the same way to make one of the five numbered figures beneath. 

Sample 1
Civil Service GRT Sample

Sample 2
Civil Service GRT Sample

Answer and explanation below.


Answers

Number Series

Sample 1

Answer: 3

Explanation: This series alternately multiplies by 3 - divides by 2 to get to the next number.
8         24          12          36          18          54          27
        *3         /2          *3          /2         *3           /2
This series can also be looked at as 2 separate series intertwined where:
The odd and even terms each increase by *1.5. Therefore the missing number is 18 X 1.5=27.

Odd terms: 8                12                18                27

                       *1.5                *1.5             *1.5

Even terms: 24                36                54

                         *1.5                *1.5

Sample 2 

Answer: 1

Explanation: In this series the first term is multiplied by 7 to get to the next number in the series. The second term is then multiplied by 5, the third by 3 and so on.
1                7                35                105                105                -105

      *7                  *5                   *3                     *1                    *(-1)

If we take a closer look at the pattern: *7, *5, *3, *1 we will notice that the multiplier continuously goes down by 2. Following this pattern, the next multiplier will be 1-2=-1.

105*(-1)=-105

Arithmetic

Sample 1 



Sample 2


Similarities

Sample 1 


The correct answer is 5.


DOCTOR and TEACHER are both occupations. They can therefore be defined as, "types of occupations."

A DOCTOR performs SURGERY. These two words may appear to be similar as they both are related to the field of medicine. However, since they have different relationships to the field of medicine (a doctor practice medicine, while surgery is a type of treatment), it will not be the best answer choice. As it may be confusing to compare the which relationships are stronger, we suggest to try and give a shared definition to both words in a pair to identify the correct answer. Since there is no distinct definition that can be given to DOCTOR and SURGERY, it can be eliminated.

A TEACHER teaches in a SCHOOL. Just like DOCTOR- SURGERY, TEACHER – SCHOOL have a strong relationship, however do not have a shared definition as distinct as, "types of occupations."

A DESK can be found in a CLASSROOM.

Often, if we can take an answer choice and make a short sentence out of the two words as we just did, that answer choice can be eliminated. This is because the two words do have a commonality, however they cannot both be defined in the same manner. DOCTOR or SURGERY for example are not defined as medicine, albeit they are related to the field of medicine. DOCTOR and TEACHER are defined as occupations. Remember though, the fact that a short sentence can be made out of the two words does not mean that there is no common definition of the two words. The sentence rule just helps us indicate distractors which may appear to be correct because of their close association. 

Sample 2 

The correct answer is 1.

A TYPEWRITER and PEN can both be defined as, “things which can be used to write.” This is the most distinct and well defined definition that applies to both words in any pair.

A KEYBOARD is on a TYPEWRITER. Although these two words have a close relationship, they do not have a shared definition.

NEWS - PAPER may appear to be very similar as it is a compound word. However, since there is no distinct definition that can be given to both of these words, it can be eliminated.

PEN and PAPER are both used for writing. If we compare this similarity with that of TYPEWRITER - PEN, we will realize that although PEN and PAPER are both used in the writing process, PEN and TYPEWRITER serve the same function in the writing process; A PEN and a TYPEWRITER both contain ink and are used to put ink onto paper. Thus, PEN - TYPEWRITER have a stronger similarity than PEN - PAPER have.

Figure Analogies 

Sample 1

The correct answer is 1.

The relationship between figure X and figure Y is as follows:

  1. Figure Y represents figure X rotated 90° clockwise
  2. The dark triangle becomes white.

The correct answer must have the same relationship with figure Z.

Answers 2, 3 and 4 can be eliminated as they represent the shapes in figure Z in new locations; however, they are not rotations of the entire figure.
Answer 5 can be eliminated as it is a 90° counterclockwise rotation of figure Z.

We are left with answer 1, which the correct answer, as it portrays figure Z rotated 90° clockwise, while the dark triangle becomes white.

Sample 2

The correct answer is 1.

The relationship between figure X and figure Y is as follows:

From figure X to figure Y:

  1. The shape in back (circle) moves to the front and becomes dark, and

The entire figure rotates 90° clockwise.

The correct answer must have the same relationship with figure Z.

Answers 3 and 5 can be eliminated as the back shape in figure Z (rectangle), did not move to the front.
Answer 2 can be eliminated as it shows figure Z rotated 90° counterclockwise.
Answer 4 can be eliminated as it shows the triangle and rectangle aligned so that the vertex of the triangle is behind the rectangle.

We are left with answer 1, which is the correct answer, as it portrays figure Z with the back shape (rectangle) now in front and dark, while the whole figure is rotated 90° clockwise.


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