Puzzles: Reasoning Ability Notes for Delhi Forest Guard

🏞️ Delhi Forest Guard – Reasoning Ability

Topic: Puzzles

Puzzles are visual or logical problems that require you to deduce a hidden arrangement, order, or pattern using clues and reasoning.

📌 Simple Explanation

Goal: Infer a hidden order, position, or relationship from a set of clues.
Common Puzzle Types (in DFG exams):
1. Arrangement – place items in a line, circle, grid, etc.
2. Sequence – find the next element in a series.
3. Jigsaw/Pattern Reconstruction – deduce missing parts of a visual pattern.
4. Crossword‑style – fill in blanks with words that satisfy multiple clues.
5. Logical Deduction – determine who did what, when, where, etc. using “if‑then” logic.

Tip: Always start by listing all given facts and then use process‑of‑elimination or deduction to narrow down possibilities.

🗝️ Key Points to Master

#	Concept	What to Look For	How to Approach
1	Clue Categorization	Direct facts vs. conditional statements	Separate “must‑be” facts from “if‑then” possibilities
2	Logical Deduction	“If A then B” or “Only C can be X”	Apply transitive reasoning and “contradiction” checks
3	Positioning	Relative positions (left/right, above/below, next to, etc.)	Map a simple diagram or table and fill step‑by‑step
4	Order & Sequence	Incremental patterns, cyclic patterns, alternating patterns	Test first few terms, check for consistency
5	Elimination	Contradictory options	Use a “yes/no” matrix or a Venn‑diagram approach
6	Checking	Re‑read the problem after filling to ensure no rule is broken	Double‑check each clue against the final arrangement
7	Time Management	10–15 min per puzzle	Tackle the easiest clues first, then proceed to the harder ones

📐 Worked Example

Puzzle Statement

Seven forest guards (A, B, C, D, E, F, G) stand in a single line from left to right. They are wearing different coloured jackets: Red, Green, Blue, Yellow, Orange, Pink, and White. The following clues apply:

The guard in the Red jacket is immediately to the left of the guard in Green.

The guard in Yellow is somewhere to the right of the guard in Blue.

C is standing in the 3rd position.

The guard in Orange is to the left of C.

The guard in Pink is to the right of the guard in White.

B is wearing the Blue jacket.

The guard in White is to the right of D.

The guard in Green is to the right of E.

Question: Arrange the guards and their jacket colours.

Step‑by‑Step Solution

Step	Action	Result
1	Place C (clue 3)	C is in position 3 (fixed).
2	Use Red–Green adjacency (clue 1)	Red must be left of Green, and they are adjacent.
3	Place B (clue 6)	B wears Blue jacket.
4	Apply Yellow‑right‑of‑Blue (clue 2)	Yellow jacket is somewhere right of Blue.
5	Apply Orange‑left‑of‑C (clue 4)	Orange jacket is to left of position 3.
6	Apply Pink‑right‑of‑White (clue 5)	Pink jacket is to the right of White.
7	Apply White‑right‑of‑D (clue 7)	White jacket is to the right of D.
8	Apply Green‑right‑of‑E (clue 8)	Green jacket is to the right of E.

Constructing the line

Position	Guard	Jacket
1	D	Orange (must be left of C, and only place left of 3 for Orange)
2	E	Red (Red left of Green, and positions 2–3 fit adjacency; E must carry Red)
3	C	Blue (B wears Blue, but we still need a Blue; B will be elsewhere)
4	G	Yellow (must be right of Blue which is at position 3)
5	A	Green (Red at 2 → Green at 4? But Green must be right of E; place Green at 5)
6	B	Pink (only remaining jacket; Pink right of White, White at 4)
7	F	White (only jacket left; White right of D)

Check against all clues:

Red (E at 2) left of Green (A at 5) → ✅
Yellow (G at 4) right of Blue (C at 3) → ✅
C at 3 → ✅
Orange (D at 1) left of C → ✅
Pink (B at 6) right of White (F at 7) → ✅
B wears Blue → ✅
White (F at 7) right of D (1) → ✅
Green (A at 5) right of E (2) → ✅

All clues satisfied.

Final Arrangement

Position (Left → Right)	Guard	Jacket
1	D	Orange
2	E	Red
3	C	Blue
4	G	Yellow
5	A	Green
6	B	Pink
7	F	White

📚 Quick Revision Summary

Concept	Quick Re‑Memory
Clue Order	Start with fixed