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Reasoning Questions based on Symbols

Questions based on symbols.

In this section there are many different types of questions. One of the type is where a lot of symbols are used having different meanings and then questions are framed on the basis of the inference of these symbols. The questions are very easy and scoring if you can quickly decode and understand the meaning of the symbols. Below are some questions where hardly any knowledge of maths is used but you must have a deep sense of understanding basics otherwise you will end up making mistakes like. If I tell I> J ; & J = M ; & M< N and N < P; Now if I ask you relation between I J M N & P, It would sound a bit cumbersome, but if you look at it with relax mind then you can observe that I is greater than J which is equal to M so indirectly I is also greater than M and since M is less than N so indirectly I is also greater than N, But P is greater than N; How much greater ? We don't know. May be just a little greater so that it is still less than all the remaining ones or may be so greater that it is the greatest. In other words the extent to which P is more than N is not told here in this statement. So these are the things you need to keep in mind. Rest is all very very easy !!

In the following questions, the symbol  × , ∂ , % ,   © , @ , are used with the following illustrations.

     P % Q means P is not smaller than Q
     P © Q means P is neither smaller than nor equal to Q
     P x Q means P is neither greater than nor equal to Q
     P Q means P is not greater than Q
     P @ Q means P is neither greater than nor smaller than Q

Question  1    Statement – R K ; K x M ; M @ J

         Conclusions -:

Reasoning Ability - Statements Based Questions

Questions Based on Statements.

In Reasoning Ability there are few though not too many question which are based on statements. The statement is given and followed by some rule which can vary from paper to paper, but normally how you should tackle those is somewhat same every time. What should be kept in mind is that, this section is very thoughtful and if you hurry to answer, there will arise chances that you can mark a wrong answer but if you tackle them without anxiety and stress, you will not only mark the right answer but will also save much time from these questions because here no calculation is involved. Just thought process !

Follow the Questions carefully now !

Directions for Questions – Two statements are given for each question and you need to check the cause and effect. Not necessary that one will be cause and other effect. It can be anything, both cause, both effect or either one cause & other effect.

So Mark A if the statement I is cause and II is effect of it.
Mark B if II is the cause and I is effect.
Mark C if both I & II are independent causes.
Mark D if both statements I & II are effects of independent causes.
Mark E if both statements I & II are effects of some common cause.

Read the instructions once more carefully if not understood.

Problem 1.  
              I.     The average day temperature of the city has increased by about 2°C in the current year over the average of last 10 years.
            II.     More people living in rural areas of the state have started migrating to the urban areas in comparison to earlier years.



Problems  based on Combinations & Probability !

Problem – An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles.
Two marbles are picked randomly. What is the probability that both are red.
a.      1/6
b.      1/3
c.      2/15
d.      2/5
e.      None
Answer – First one ball can be picked out of six and next time one out of five. So total ways of pick 2 red = 6C2 = 6! / ( 4! X 2! ) = 15
Total number of picking any two balls =  15C2 = 105
P(R) = 6C2 / 15C2 = 15 / 105 = 1/7

Problem – If three marbles are picked randomly what is the probability that two are blue and one is yellow.
a.      3/91
b.      1/5
c.      18/455
d.      7/15
e.      None
Answer – Picking three balls, total number of exhaustive cases = 15C3
Picking three balls, in required fashion = 4C2   3C1
Required probability =  4C2   3C1   15C3 = 6 x 3 / 455  = 18 / 455

Problem – If four marbles are picked at random, then what is the probability that atleast one is blue.
a.      4/15
b.      69/91
c.      11/15
d.      22/91
e.      None
Answer – Picking 4, total No of exhaustive cases = 15C4
No of cases when we will have none blue = picking 4 balls from remaining 11 other colour balls = 11C4
If we subtract this from total number of cases we get cases where atleast one ball will be blue
= 15C4  -  11C4  = 1365 – 330 = 1035
Probability = 1035 / 1365 =  207 /273 =69/91
Now you must have understood how to deal with such types.

Problem – Study the table carefully and answer the questions that follow.

Number of People staying in Five different localities and the % breakup of men, women and chidren
Total No of People

Question – What is the total number of men and children staying together in locality I ?
a.      4115
b.      4515
c.      4551
d.      4155
Answer – Total number of men and children staying together in locality I = ( 65% + 10% )of 6020
                                                                           =(0.65+0.10) x 6020 = 0.75 x 6020 = 4515

Quesiton – The number of women staying in which locality is highest ?
a.      H
b.      J
c.      F
d.      G
Answer -  Number of women staying in each of these 4 localities are
                              In H = 39% of 5200 = 0.39 x 5200= 2028
In J = 41% of 4200 = 0.41 x 4200 = 2009
In F = 35% of 5640 = 0.35 x 5640 = 1974
In G = 44% of 4850 = 0.44 x 4850 = 2015
Clearly in H locality there are highest  number of women.

Question – What is the total number of children staying together in ,locality H & I together ?
a.      1287
b.      1278
c.      1827
d.      1728
Answer -  Number of children in H = 13% of 5200 = 0.13 x 5200 = 676
               Number of Children in I = 10% of 6020 = 0.10 x 6020 = 602
Total number of children staying together in I &H  locality together  = 676 + 602 = 1278

Question -   The total number of people staying in locality J forms what percentage of total number of people staying in locality F ?
a.      81
b.      72
c.      78
d.      93
e.      87
Answer -  People in locality J divded by people in locality F = 4900 / 5640 =  0.8687 0.87 or 87 %

Selected Reasoning Questions For BANK PO & Clerical

Question – In a certain language "they have come back" is written as "na sa ja da" and "they have gone there" is written as "da ka na pa". How is 'come' written in that language ?
a.      da
b.      sa
c.      ja
d.      sa or ja
Answer – The two common words are they have, so look out for their translation by identifying common words. You will find 'na' & 'da' so remaining words in first clause are 'come back' which means sa or ja. But you cannot tell which will be which, so you have to mark option d.
Question – Each consonant in the word TIRADES is replaced by previous alphabet and each vowel is replaced by the next alphabet. The alphabets are the arranged alphabetically.  Which of the following will be the fourth from Right end?
a.      F
b.      J
c.      Q
d.      C
e.      None of these
Answer – TIRADES on replacement will become – SJQBCFR. If we arrange this alphabetically we get, BCFJQRS. Fourth from right is J.
Question – Pointing to girl Ram said, she is the daughter of my grandfather's only child. How is the girl related to Ram ?

Mental Ability Practice Questions Download


The section on Mental Ability is usually very easy but confusing. With very little practice you can score very good marks in this section. look at the level of questions appearing in past few papers and you will realize that it is not at all difficult.

You can download the pdf file of Mental Ability questions for studying.
This file was available online and I will just paste the link here. Hope the answers are correct, as I haven't verified them because they are so easy that I can't waste my time on it.
The link is


Hope you also enjoy this section..
I will soon post some selected questions that will give you the taste of exams.

Maths tricks and short cuts for exams Bank PO, SSC, Clerical, Insurance, CSAT, others