Tips & Tricks to solve Order & Ranking Problems

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Tips & Tricks to solve Order & Ranking Problems

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Some basic formulas to determine the positioning of a person:

  • Left + Right = Total + 1 
  • Left = Total + 1 – Right
  • Right = 1 + 1 – left
  • Total = left + Right

Formulas for vertical & Horizontal

  • Total + 1 = top + Bottomimage 1
  • Top = Total + 1 – Bottom
  • Bottom = Total + 1 – Top
  • Total = Top + Bottom 

Note: The above formulas are only for a single person’s position

 

FOR EXAMPLE:

 

In a row of 40 students, A is 13th  from the left end, find the rank from right end. 

Solution -:  Total = 40 studentsOimg 2
A’s rank from right side = Total + 1 – left

= 40 – 13 + 1 = 27 + 1 = 28 

 

In a row ‘P’ is 25th from left end, Q is 30th from right end.  Find the total no. of students in all. 

Solution -: Can’t be Determined as there are more than 1 possibilities in this case

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When total is not given and 2 persons positions from left and right are given, then answer is Can’t be Determined

 

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