Logical Reasoning Puzzles Flashcards

Three witnesses gave statements at 9 AM, 11 AM, and 2 PM. The crime occurred between the first and second statements. Which statements are most relevant to establish a timeline?

Answer: The 9 AM and 11 AM statements

The crime occurred between 9 AM and 11 AM, so those two statements bracket the event and are most relevant.

A cipher replaces each letter with the one two places before it in the alphabet (C=A, D=B). What does 'FQNN' decode to?

Answer: DELL

Shifting each letter back 2: F→D, Q→O... wait — F(6)→D(4), Q(17)→O(15), N(14)→L(12), N(14)→L(12) gives DOLL.

Five RCMP divisions are ranked 1 to 5. Division C is ranked higher than Division A but lower than Division E. Division B is ranked lowest. Division D is ranked higher than Division E. What is Division A's rank?

Answer: Rank 4

Order from highest: D, E, C, A, B — Division A is ranked 4th.

An investigator must interview suspects in pairs, never alone. There are 4 suspects. How many unique pairs can be interviewed?

Answer: 6

The number of unique pairs from 4 suspects is C(4,2) = 4!/(2!×2!) = 6.

A logic puzzle states: 'Either the informant lied or the evidence was planted.' The evidence was not planted. What follows?

Answer: The informant lied

In a disjunction where one option is false, the other must be true — so the informant lied.

An officer checks IDs at a checkpoint. Every person under 18 must show a guardian ID. A 16-year-old approaches without a guardian ID. What action follows logically?

Answer: Request a guardian ID

The rule requires anyone under 18 to show a guardian ID, so the officer must request one.

A sequence of radio codes is: Alpha, Charlie, Echo, Golf, ___. What comes next?

Answer: India

The pattern skips every other NATO phonetic letter (A, C, E, G), so the next is India (I).