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Lesson 1 of 9 · All facing centre

Left right reversal

Circular / Square Arrangement · for IPMAT Indore, IPMAT Rohtak and JIPMAT · asked in JIPMAT 2025

Worked examples

Example 2Sitter

Eight people face the centre. Who is third to the right of X if Y is fifth to the left of X?

Example 3Easy

Seven people face the centre. G is second to the left of C, who is immediately to the left of F. A is third to the left of E, and B sits between D and E. Who is immediately to the right of G?

Formulas you need

Facing the centre: right=anticlockwise, left=clockwise\text{Facing the centre: right} = \text{anticlockwise}, \ \text{left} = \text{clockwise}

k-th to the right of X=k-th to the left of X counted the other way: k↔n−kk\text{-th to the right of } X = k\text{-th to the left of } X \text{ counted the other way: } k \leftrightarrow n - k

Watch out

  • Right and left reversed for centre-facing people: right is anticlockwise.

Picked from the All facing centre note for this micro-concept automatically. The whole note: All facing centre.