Logical Deduction Questions, Examples and Videos

Logical Deduction Solved Example - Page 2
Logical Deduction Important Questions - Page 3
Logical Deduction Video Lecture - Page 4

As the name itself suggests, logical deduction questions require logical thinking. Every question starts off with a premise which might be of any one of the following types:

Logical Deduction Premises- Various Patterns

Type 1: If A Happens B Happens
This means that A leads B, but does not mean the reverse, i.e., if B has happened, A must have happened. In such situations, A is a sufficient condition for B, but is not a necessary condition.
Let’s look at the following example:
If I go to a movie, I enjoy myself.
This would mean, that if I have gone to the movie, I will definitely enjoy myself. However, it does not mean that if I have enjoyed myself, I must have gone to the movie- there are so many ways of enjoying yourself.
Another example of this type would be:
If Amitabh acts in a move, he will earn money.
This does not mean that if he has earned money, he must have acted in the movie.

Type 2: Only If A Happens B Happens
In this case, A is necessary and sufficient condition for the occurrence of B. In this case, there is reversibility of the logic, i..e.., if B has happened, A must have happened.
Only If Saurav plays the match, will he get a hundred.
If Saurav has got a hundred, he must have played the match.

Type 3: If A Happens B does not Happen
In this case, if A has happened, B does not happen. The opposite is also true, i.e.., if B has happened. A must not have happened.
If Martina plays well, Sania will not win.

Type 4: If A does not Happen B will Happen
Again in this case, the reverse might not be true.
If Anand does not come, Kasparov will. This does not mean that if Kasparov comes, Anand will not come.

Type 5: Either A or B will Happen
One of the two has to happen. At the same time, the two events are exclusive of one another. If one happens, the other will not happen.
Either he becomes a TV star or he becomes a movie star.

 

Latest Jobs

  1. Type
    Job Notification
    Job
    IBPS Recruitment Specialist Officers 1163 Vacancies - Last Date 26-11-2019
    Location
    Anywhere
    Date Posted
    20 Nov 2019
  2. Type
    Job Notification
    Job
    CISF Recruitment for 300 HEAD CONSTABLE - SPORTS QUOTA - Last Date 17-12-2019
    Location
    Anywhere
    Date Posted
    19 Nov 2019
  3. Type
    Job Notification
    Job
    IOCL Invites Application for 1542 Apprentice - Last Date 15-11-2019
    Location
    Anywhere
    Date Posted
    5 Nov 2019
  4. Type
    Job Notification
    Job
    SAIL Bhilai Recruitment of Operator cum Technician, Nurse, Fire Station Officer, and more - Last Date 15-11-2019
    Location
    Vaishali NagarChhattisgarh, India
    Date Posted
    5 Nov 2019
  5. Type
    Job Notification
    Job
    Naval Ship Repair Yard, Karnataka Recruitment of 145 ITI qualified. - Last Date 01-12-2019
    Location
    KarwarKarnataka, India
    Date Posted
    5 Nov 2019
  6. Type
    Job Notification
    Job
    IIT Dhanbad 191 Recruitment Engineers, Staff Nurse and others - Last Date 14-12-2019
    Location
    DhanbadJharkhand, India
    Date Posted
    5 Nov 2019
  7. Type
    Job Notification
    Job
    INDIAN Bank Recruitment of 115 Security Guard cum Peon – Last Date 08-11-2019
    Location
    Anywhere
    Date Posted
    28 Oct 2019
  8. Type
    Job Notification
    Job
    AIIMS Rishikesh 184 Recruitment Staff Nurse, Assistant Nursing Superintendent – Last Date 30-11-2019
    Location
    RishikeshUttarakhand, India
    Date Posted
    28 Oct 2019
  9. Type
    Job Notification
    Job
    Cement Corporation of India Recruitment of 60 Artisan Trainees - Last Date - 25-10-2019
    Location
    Anywhere
    Date Posted
    25 Oct 2019
  10. Type
    Job Notification
    Job
    MFL Recruitment of 93 Engineering, Management Trainees, Assistant Trainees - Last Date 25-10-2019
    Location
    ChennaiTamil Nadu, India
    Date Posted
    25 Oct 2019

Jobs by Category

Syllabus and Previous Papers

Leave a Reply

Your email address will not be published. Required fields are marked *