25 questions from 2023
The number of ordered triplets of the truth values of \( p \), \( q \) and \( r \) such that the truth value of the statement \( (p\vee q)\wedge(p\vee r)\Rightarrow(q\vee r) \) is true, is equal to ______.
(S1) $(p \Rightarrow q) \vee (p \wedge (\sim q))$ is a tautology
(S2) $((\sim p) \Rightarrow (\sim q)) \wedge ((\sim p) \vee q)$ is a contradiction.
Then.
Statement \( (P \Rightarrow Q) \land (R \Rightarrow Q) \) is logically equivalent to:
Let $p$ and $q$ be two statements. The $\sim(P \wedge (p \implies \sim q))$ is equivalent to:
If \( p, q \) and \( r \) are three propositions, then which of the following combination of truth values of \( p, q \) and \( r \) makes the logical expression \( \{(p \vee q) \wedge ((\sim p) \vee r)\} \rightarrow ((\sim q) \vee r) \) false?
The statement \( \sim[p \lor (\sim(p \land q))] \) is equivalent to:
Consider the following statements :\( P:\) I have fever \( \\ \\ Q:\) I will not take medicine \( \\ \\ R:\) I will take restThe statement “If I have fever, then I will take medicine and I will take rest” is equivalent to :
The statement \( \big(p \land (\sim q)\big) \lor \big((\sim p)\land q\big) \lor \big((\sim p)\land (\sim q)\big) \) is equivalent to ________.
The statement \( (p \land (\sim q)) \Rightarrow (p \Rightarrow (\sim q)) \) is:
The negation of the statement \( (p \vee q)\wedge(q \vee (\sim r)) \) is:
The compound statement \( (\sim(P \land Q)) \lor ((\sim P) \land Q) \Rightarrow ((\sim P) \land (\sim Q)) \) is equivalent to:
The number of values of $r \in \{p, q, \sim p, \sim q\}$ for which $((p \wedge q) \Rightarrow (r \vee q)) \wedge ((p \wedge r) \Rightarrow q)$ is a tautology, is:
The statement \( B \Rightarrow ((\sim A) \lor B) \) is equivalent to:
Among the two statements \( (S1): (p \Rightarrow q) \land \left(p \land (\sim q)\right) \) is a contradiction and \( (S2): (p \land q) \lor \left((\sim p) \land q\right) \lor \left(p \land (\sim q)\right) \lor \left((\sim p) \land (\sim q)\right) \) is a tautology.
The negation of the statement \( ((A \wedge (B \vee C)) \Rightarrow (A \vee B)) \Rightarrow A \) is:
For the system of linear equations\( 2x - y + 3z = 5 \) \( 3x + 2y - z = 7 \) \( 4x + 5y + \alpha z = \beta \),Which of the following is NOT correct?
Negation of \( p \wedge (q \wedge \sim(p \wedge q)) \) is:
Among the statements:(\( S1 \)): \( (p \Rightarrow q) \vee ((\sim p) \wedge q) \) is a tautology.(\( S2 \)): \( (q \Rightarrow p) \Rightarrow ((\sim p) \wedge q) \) is a contradiction.
Negation of \( (p \Rightarrow q) \Rightarrow (q \Rightarrow p) \) is:
The converse of \( ((\sim p)\wedge q) \Rightarrow r \) is:
Among the statements:\( (S1) \; ((p \lor q) \Rightarrow r) \Leftrightarrow (p \Rightarrow r) \)\( (S2) \; ((p \lor q) \Rightarrow r) \Leftrightarrow ((p \Rightarrow r) \lor (q \Rightarrow r)) \)
Let \( \Delta,\nabla \in \{\land,\lor\} \) be such that \( (p \to q)\,\Delta\,(p \nabla q) \) is a tautology. Then
Which of the following statements is a tautology?
The negation of \( \big(p\land(\sim q)\big)\lor(\sim p) \) is equivalent to:
The negation of the expression \( q \vee \big((\sim q) \wedge p\big) \) is equivalent to:
