ERB Logical Reasoning and Problem Solving 3

Question 1

Which of the following represents an 'if-then' (conditional) statement?

Accepted Answer

If it rains, then the ground gets wet.

Answer

A conditional statement has the form 'If P, then Q,' expressing that one condition leads to a result.

Question 2

In a Venn diagram problem on the ERB, what does the overlapping region represent?

Accepted Answer

Items belonging to both groups

Answer

The overlapping region of a Venn diagram represents elements that are members of both sets simultaneously.

Question 3

What is the contrapositive of 'If it is raining, then the streets are wet'?

Accepted Answer

If the streets are not wet, then it is not raining.

Answer

The contrapositive reverses and negates both parts of a conditional: 'If not Q, then not P.'

Question 4

How many ways can 3 books be arranged on a shelf from a set of 5 different books (order matters)?

Accepted Answer

60

Answer

This is a permutation: 5 × 4 × 3 = 60, since order matters and each slot has fewer choices.

Question 5

In an ERB logic grid puzzle, what is the key technique for eliminating wrong answers?

Accepted Answer

Use process of elimination based on given clues

Answer

Logic grid puzzles are solved by systematically ruling out impossible combinations using each clue provided.

ERB - Educational Records Bureau Practice Test