Abstract and Logical Reasoning Flashcards

Which number is the odd one out: 4, 9, 16, 21, 25?

Answer: 21

4=2², 9=3², 16=4², 25=5² are all perfect squares. 21 is not a perfect square.

If today is Wednesday and a suspect must appear in court in 10 days, what day is the court appearance?

Answer: Saturday

Wednesday + 10 days: Thu, Fri, Sat, Sun, Mon, Tue, Wed, Thu, Fri, Sat = Saturday.

Complete the pattern: A1, B2, C3, D4, ___

Answer: E5

The pattern progresses alphabetically (A, B, C, D, E) with incrementing numbers (1, 2, 3, 4, 5). Next is E5.

All detectives are Gardaí. Some Gardaí drive patrol cars. Which conclusion is definitely true?

Answer: Some Gardaí are detectives

Since all detectives are Gardaí, detectives are a subset of Gardaí. Therefore 'some Gardaí are detectives' is always true.

What is the next shape in a sequence of: circle, triangle, circle, square, circle, pentagon, circle, ___?

Answer: Hexagon

After each circle, a polygon with one more side appears: triangle (3), square (4), pentagon (5), hexagon (6).

A criminal is described as tall, with a beard, and wearing a red jacket. Witness B says the person was short. What does this tell us?

Answer: Witness B's description contradicts the other description

Witness B's description of 'short' directly contradicts the 'tall' description. We can only say there is a contradiction — we cannot determine who is correct.