Reasoning (Order And Ranking Concepts)

Order And Ranking Concepts

Formulas to determine the positioning of a person

1)Left + Right = Total + 1

2)Left = Total + 1 – Right

3)Right = 1 + 1 – left

4)Total = left + Right

Note : the above formulas are only for a single person's position

Example:-

Eg.1: In a row of 40 students, A is 13th from the left end, find the rank from right end.

Ans Total = 40

A’s rank from right side = Total + 1 – left

= 40 – 13 + 1

= 27 + 1

= 28

Eg 2: In a row of children. A is 17th from left, B is 15th from right.

(1) find the total number of children in the row

Ans. Can’t be determined, as there are more than 1 possibilities