Friday, October 14, 2016

Reasoning Ability Quiz 125 for IBPS PO

Directions (Q. 1-5): Study the following information carefully and answer the questions given below.
(i) Seven persons A, B, C, D, E, F and G are teaching seven subjects History, Geography, Physics, Chemistry, Maths, Biology and English from Monday to Friday. Each person teaches a different subject and not more than two subjects are taught on any one of the days.
(ii) Chemistry is taught by B on Tuesday.
(iii) D teaches on Friday but neither Geography nor Physics.
(iv) F teaches History but neither on Thursday nor on Friday.
(v) A teaches English on the day on which History is taught.
(vi) C teaches Maths on Monday.
(vii) Geography and Chemistry are taught on the same day.
(viii) G teaches on Thursday.

1. English is taught on which day?
1)  Wednesday 2) Monday 3) Tuesday 4) Data inadequate 5) None of these

2. Which of the following subjects is taught by ‘G’?
1) Biology 2) Geography 3) Physics 4) Chemistry 5) None of these

3. Geography is taught on which day?
1) Monday 2) Tuesday 3)  Wednesday 4) Thursday 5) Friday

4. Which subject is taught on Friday?
1) Physics 2) History 3) Geography 4) Biology 5) None of these

5. Which of the following pairs of persons teaches on Tuesday?
1) B and D 2) A and B 3) B and F 4) B and C 5) None of these

Directions (Q. 6-10): Study the following information carefully and answer the questions given below it: Six lectures — A, B, C, D, E and F — are to be delivered from Monday to Sunday, one lecture every day.
(i) Lecture C cannot be delivered on Friday.
(ii) Lecture A is delivered immediately after lecture D.
(iii) There should be a gap of two days between the lectures B and F.
(iv) There is one holiday except Saturday. Lecture F is delivered on the next day of holiday.
(v) Lecture E is delivered on Wednesday and it is not immediately followed by lecture F.

6. On which day was lecture D delivered?
1) Friday 2) Saturday 3) Sunday 4) Thursday 5) None of these

7. On which day was holiday?
1) Sunday 2) Friday 3) Monday 4) Can’t be determined 5) None of these

8. How many lectures were delivered between F and D?
1) None 2) One 3) Two 4) Three 5) None of these

9. Which of the following was the last lecture?
1) A 2) C 3) B 4) Can’t be determined 5) None of these

10. Which of the following statements is not necessary to determine the order of lectures?
1) (i) 2) (ii) 3) (v) 4) (i) and (ii) 5) All statements are necessary

Answers :-

(1-5):Here Seven persons are: A, B, C, D, E, F and G.
Seven  subjects  are:  History,  Geography,  Physics,  Chemistry, Maths, Biology and English.
Subjects are taught on: Monday, Tuesday, Wednesday, Thursday and Friday.
Now let us proceed with direct information.
From clues (ii), (vi) and (viii), we get


From, Table  2,  it  is  obvious  that  E  teaches  Geography  on Tuesday.
Now, History and English are not taught on Tuesday, Monday,
Thursday  and  Friday.  Therefore,  History  and  English  are taught  on  Wednesday.
Again, from Table 2, it is obvious that D teaches either Physics or Biology. But, from clue (iii), D does not teach Physics. Hence,
D  teaches  Biology.  By  elimination,  G  teaches  Physics.

Hence, the obtained information can be summarised as below:


1.1 ,    2.3 ,    3.2 ,    4.4 ,    5. 5; B and E

(6 to 10)


From clue (v):Lecture E is delivered on Wednesday. And
the lecture F was not delivered on Thursday.
Again,  from  clue  (iv): Tuesday  and  Saturday  were  not
holiday. From direction part it is obvious that neither Monday nor Sunday was holiday. So, by elimination holiday was
either on Thursday or on Friday.
Now, from clues (iii) and (iv) we get the following orders
of lectures of B and F
X.  B * Holiday F
Y.  Holiday F * * B
Reject the possibility ‘Y’ because according to it there must
be at least four lectures after  holiday. This is not possible
even when the holiday is on Thursday.
Now,  use  the possibility  ‘X’.  If  holiday  is on  Friday,  two
lectures (B & E) need to be arranged on Wednesday, which is
not  possible.  Therefore,  the  holiday  must be  on  Thursday. And  the  lectures  B  and  F  delivered  on Tuesday
and  Friday  respectively..
Now, from clue (ii):A  can’t be  delivered either  on Monday or on Saturday. Obviously, the lecture A was delivered
on Sunday. This implies that the lecture  D was delivered
on  Saturday.  By  elimination,  the  lecture  C  was  delivered  on  Monday.
Thus, the whole information can be tabulated as below


6. 2
7. 5; Thursday
8. 1
9. 1
10. 1

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