Mathematical Reasoning

122 Questions
2023 JEE Mains MCQ
JEE Main 2023 (Online) 15th April Morning Shift
Negation of $p \wedge(q \wedge \sim(p \wedge q))$ is :
A.
$(\sim(p \wedge q)) \wedge q$
B.
$(\sim(p \wedge q)) \vee p$
C.
$p \vee q$
D.
$\sim(p \vee q)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 13th April Evening Shift

The statement $(p \wedge(\sim q)) \vee((\sim p) \wedge q) \vee((\sim p) \wedge(\sim q))$ is equivalent to _________.

A.
$(\sim p) \vee(\sim q)$
B.
$p \vee(\sim q)$
C.
$\mathrm{p} \vee \mathrm{q}$
D.
$(\sim p) \vee q$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 13th April Morning Shift

The negation of the statement $((A \wedge(B \vee C)) \Rightarrow(A \vee B)) \Rightarrow A$ is

A.
equivalent to $B ~\vee \sim C$
B.
equivalent to $\sim A$
C.
equivalent to $\sim C$
D.
a fallacy
2023 JEE Mains MCQ
JEE Main 2023 (Online) 12th April Morning Shift

Among the two statements

$(\mathrm{S} 1):(p \Rightarrow q) \wedge(p \wedge(\sim q))$ is a contradiction and

$(\mathrm{S} 2):(p \wedge q) \vee((\sim p) \wedge q) \vee(p \wedge(\sim q)) \vee((\sim p) \wedge(\sim q))$ is a tautology

A.
both are false.
B.
only (S1) is true.
C.
both are true.
D.
only (S2) is true.
2023 JEE Mains MCQ
JEE Main 2023 (Online) 11th April Evening Shift

The converse of $((\sim p) \wedge q) \Rightarrow r$ is

A.
$((\sim p) \vee q) \Rightarrow r$
B.
$(\sim \mathrm{r}) \Rightarrow \mathrm{p} \wedge \mathrm{q}$
C.
$(\mathrm{p} \vee(\sim \mathrm{q})) \Rightarrow(\sim \mathrm{r})$
D.
$(\sim \mathrm{r}) \Rightarrow((\sim \mathrm{p}) \wedge \mathrm{q})$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 10th April Evening Shift

The statement $\sim[p \vee(\sim(p \wedge q))]$ is equivalent to :

A.
$(\sim(p \wedge q)) \wedge q$
B.
$\sim(p \vee q)$
C.
$(p \wedge q) \wedge(\sim p)$
D.
$\sim(p \wedge q)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 10th April Morning Shift

The negation of the statement $(p \vee q) \wedge (q \vee ( \sim r))$ is :

A.
$(( \sim p) \vee r)) \wedge ( \sim q)$
B.
$(p \vee r) \wedge ( \sim q)$
C.
$(( \sim p) \vee ( \sim q)) \vee ( \sim r)$
D.
$(( \sim p) \vee ( \sim q)) \wedge ( \sim r)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 8th April Evening Shift

The negation of $(p \wedge(\sim q)) \vee(\sim p)$ is equivalent to :

A.
$p \wedge q$
B.
$p \wedge(\sim q)$
C.
$p \wedge(q \wedge(\sim p))$
D.
$p \vee(q \vee(\sim p))$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 8th April Morning Shift

Negation of $(p \Rightarrow q) \Rightarrow(q \Rightarrow p)$ is :

A.
$(\sim q) \wedge p$
B.
$q \wedge(\sim p)$
C.
$p \vee(\sim q)$
D.
$(\sim p) \vee q$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 6th April Evening Shift

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

A.
neither (S1) and (S2) is True
B.
only (S2) is True
C.
both $(\mathrm{S} 1)$ and $(\mathrm{S} 2)$ are True
D.
only (S1) is True
2023 JEE Mains MCQ
JEE Main 2023 (Online) 6th April Morning Shift

Statement $\mathrm{(P \Rightarrow Q) \wedge(R \Rightarrow Q)}$ is logically equivalent to :

A.
$(P \Rightarrow R) \wedge(Q \Rightarrow R)$
B.
$(P \Rightarrow R) \vee(Q \Rightarrow R)$
C.
$(P \wedge R) \Rightarrow Q$
D.
$(P \vee R) \Rightarrow Q$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 1st February Evening Shift

Which of the following statements is a tautology?

A.
$\mathrm{p\vee(p\wedge q)}$
B.
$(\mathrm{p\wedge(p\to q))\to\,\sim q}$
C.
$\mathrm{p\to (p\wedge (p\to q))}$
D.
$(\mathrm{p\wedge q)\to(\sim (p)\to q)}$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 1st February Morning Shift

The negation of the expression $q \vee \left( {( \sim \,q) \wedge p} \right)$ is equivalent to

A.
$( \sim \,p) \wedge ( \sim \,q)$
B.
$( \sim \,p) \vee q$
C.
$p \wedge ( \sim \,q)$
D.
$( \sim \,p) \vee ( \sim \,q)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 31st January Evening Shift
The number of values of $\mathrm{r} \in\{\mathrm{p}, \mathrm{q}, \sim \mathrm{p}, \sim \mathrm{q}\}$ for which $((\mathrm{p} \wedge \mathrm{q}) \Rightarrow(\mathrm{r} \vee \mathrm{q})) \wedge((\mathrm{p} \wedge \mathrm{r}) \Rightarrow \mathrm{q})$ is a tautology, is :
A.
2
B.
1
C.
4
D.
3
2023 JEE Mains MCQ
JEE Main 2023 (Online) 31st January Morning Shift

$(\mathrm{S} 1)~(p \Rightarrow q) \vee(p \wedge(\sim q))$ is a tautology

$(\mathrm{S} 2)~((\sim p) \Rightarrow(\sim q)) \wedge((\sim p) \vee q)$ is a contradiction.

Then

A.
only (S2) is correct
B.
both (S1) and (S2) are correct
C.
only (S1) is correct
D.
both (S1) and (S2) are wrong
2023 JEE Mains MCQ
JEE Main 2023 (Online) 30th January Evening Shift

Consider the following statements:

P : I have fever

Q: I will not take medicine

$\mathrm{R}$ : I will take rest.

The statement "If I have fever, then I will take medicine and I will take rest" is equivalent to :

A.
$((\sim P) \vee \sim Q) \wedge((\sim P) \vee \sim R)$
B.
$(P \vee \sim Q) \wedge(P \vee \sim R)$
C.
$((\sim P) \vee \sim Q) \wedge((\sim P) \vee R)$
D.
$(P \vee Q) \wedge((\sim P) \vee R)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 30th January Morning Shift

Among the statements :

$(\mathrm{S} 1)~((\mathrm{p} \vee \mathrm{q}) \Rightarrow \mathrm{r}) \Leftrightarrow(\mathrm{p} \Rightarrow \mathrm{r})$

$(\mathrm{S} 2)~((\mathrm{p} \vee \mathrm{q}) \Rightarrow \mathrm{r}) \Leftrightarrow((\mathrm{p} \Rightarrow \mathrm{r}) \vee(\mathrm{q} \Rightarrow \mathrm{r}))$

A.
only (S1) is a tautology
B.
neither (S1) nor (S2) is a tautology
C.
both (S1) and (S2) are tautologies
D.
only (S2) is a tautology
2023 JEE Mains MCQ
JEE Main 2023 (Online) 29th January Morning Shift

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 $\left\{ {(p \vee q) \wedge \left( {( \sim p) \vee r} \right)} \right\} \to \left( {( \sim q) \vee r} \right)$ false?

A.
$p = F,q = T,r = F$
B.
$p = T,q = T,r = F$
C.
$p = T,q = F,r = T$
D.
$p = T,q = F,r = F$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 25th January Evening Shift

Let $\Delta ,\nabla \in \{ \wedge , \vee \} $ be such that $\mathrm{(p \to q)\Delta (p\nabla q)}$ is a tautology. Then

A.
$\Delta = \vee ,\nabla = \vee $
B.
$\Delta = \vee ,\nabla = \wedge $
C.
$\Delta = \wedge ,\nabla = \wedge $
D.
$\Delta = \wedge ,\nabla = \vee $
2023 JEE Mains MCQ
JEE Main 2023 (Online) 25th January Morning Shift

The statement $\left( {p \wedge \left( { \sim q} \right)} \right) \Rightarrow \left( {p \Rightarrow \left( { \sim q} \right)} \right)$ is

A.
a tautology
B.
equivalent to $\left( { \sim p} \right) \vee \left( { \sim q} \right)$
C.
a contradiction
D.
$p \vee q$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 24th January Evening Shift

Let p and q be two statements. Then $ \sim \left( {p \wedge (p \Rightarrow \, \sim q)} \right)$ is equivalent to

A.
$\left( { \sim p} \right) \vee q$
B.
$p \vee \left( {p \wedge ( \sim q)} \right)$
C.
$p \vee \left( {p \wedge q} \right)$
D.
$p \vee \left( {\left( { \sim p} \right) \wedge q} \right)$
2023 JEE Mains MCQ
JEE Main 2023 (Online) 24th January Morning Shift

The compound statement $\left( { \sim (P \wedge Q)} \right) \vee \left( {( \sim P) \wedge Q} \right) \Rightarrow \left( {( \sim P) \wedge ( \sim Q)} \right)$ is equivalent to

A.
$(( \sim P) \vee Q) \wedge ( \sim Q)$
B.
$( \sim Q) \vee P$
C.
$(( \sim P) \vee Q) \wedge (( \sim Q) \vee P)$
D.
$( \sim P) \vee Q$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 29th July Evening Shift

The statement $(p \Rightarrow q) \vee(p \Rightarrow r)$ is NOT equivalent to

A.
$(p \wedge(\sim r)) \Rightarrow q$
B.
$(\sim q) \Rightarrow((\sim r) \vee p)$
C.
$p \Rightarrow(q \vee r)$
D.
$(p \wedge(\sim q)) \Rightarrow r$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 29th July Morning Shift

The statement $(p \wedge q) \Rightarrow(p \wedge r)$ is equivalent to :

A.
$q \Rightarrow(p \wedge r)$
B.
$p\Rightarrow(\mathrm{p} \wedge \mathrm{r})$
C.
$(\mathrm{p} \wedge \mathrm{r}) \Rightarrow(\mathrm{p} \wedge \mathrm{q})$
D.
$(p \wedge q) \Rightarrow r$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 28th July Evening Shift

Let

$\mathrm{p}$ : Ramesh listens to music.

$\mathrm{q}$ : Ramesh is out of his village.

$\mathrm{r}$ : It is Sunday.

$\mathrm{s}$ : It is Saturday.

Then the statement "Ramesh listens to music only if he is in his village and it is Sunday or Saturday" can be expressed as

A.
$((\sim q) \wedge(r \vee s)) \Rightarrow p$
B.
$(\mathrm{q} \wedge(\mathrm{r} \vee \mathrm{s})) \Rightarrow \mathrm{p}$
C.
$p \Rightarrow(q \wedge(r \vee s))$
D.
$\mathrm{p} \Rightarrow((\sim \mathrm{q}) \wedge(\mathrm{r} \vee \mathrm{s}))$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 28th July Morning Shift

Let the operations $*, \odot \in\{\wedge, \vee\}$. If $(\mathrm{p} * \mathrm{q}) \odot(\mathrm{p}\, \odot \sim \mathrm{q})$ is a tautology, then the ordered pair $(*, \odot)$ is :

A.
$(\vee, \wedge)$
B.
$(\vee, \vee)$
C.
$(\wedge, \wedge)$
D.
$(\wedge, \vee)$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th July Evening Shift

If the truth value of the statement $(P \wedge(\sim R)) \rightarrow((\sim R) \wedge Q)$ is F, then the truth value of which of the following is $\mathrm{F}$ ?

A.
$\mathrm{P} \vee \mathrm{Q} \rightarrow \,\sim \mathrm{R}$
B.
$\mathrm{R} \vee \mathrm{Q} \rightarrow \,\sim \mathrm{P}$
C.
$\sim(\mathrm{P} \vee \mathrm{Q}) \rightarrow \sim \mathrm{R}$
D.
$\sim(\mathrm{R} \vee \mathrm{Q}) \rightarrow \,\sim \mathrm{P}$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th July Morning Shift

$(p \wedge r) \Leftrightarrow(p \wedge(\sim q))$ is equivalent to $(\sim p)$ when $r$ is

A.
$p$
B.
$\sim p$
C.
$q$
D.
$\sim q$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th July Evening Shift

Negation of the Boolean expression $p \Leftrightarrow(q \Rightarrow p)$ is

A.
$(\sim p) \wedge q$
B.
$p \wedge(\sim q)$
C.
$(\sim p) \vee(\sim q)$
D.
$(\sim p) \wedge(\sim q)$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th July Morning Shift

The statement $(\sim(\mathrm{p} \Leftrightarrow \,\sim \mathrm{q})) \wedge \mathrm{q}$ is :

A.
a tautology
B.
a contradiction
C.
equivalent to $(p \Rightarrow q) \wedge q$
D.
equivalent to $(p \Rightarrow q) \wedge p$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th July Evening Shift

Consider the following statements:

P : Ramu is intelligent.

Q : Ramu is rich.

R : Ramu is not honest.

The negation of the statement "Ramu is intelligent and honest if and only if Ramu is not rich" can be expressed as:

A.
$((P \wedge(\sim R)) \wedge Q) \wedge((\sim Q) \wedge((\sim P) \vee R))$
B.
$((P \wedge R) \wedge Q) \vee((\sim Q) \wedge((\sim P) \vee(\sim R)))$
C.
$((P \wedge R) \wedge Q) \wedge((\sim Q) \wedge((\sim P) \vee(\sim R)))$
D.
$((P \wedge(\sim R)) \wedge Q) \vee((\sim Q) \wedge((\sim P) \vee R))$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th July Morning Shift

Which of the following statements is a tautology ?

A.
$((\sim \mathrm{p}) \vee \mathrm{q}) \Rightarrow \mathrm{p}$
B.
$p \Rightarrow((\sim p) \vee q)$
C.
$((\sim p) \vee q) \Rightarrow q$
D.
$q \Rightarrow((\sim p) \vee q)$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 30th June Morning Shift

The conditional statement

$((p \wedge q) \to (( \sim p) \vee r)) \vee ((( \sim p) \vee r) \to (p \wedge q))$ is :

A.
a tautology
B.
a contadiction
C.
equivalent to $p \wedge q$
D.
equivalent to $( \sim p) \vee r$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 29th June Evening Shift

Negation of the Boolean statement (p $\vee$ q) $\Rightarrow$ (($\sim$ r) $\vee$ p) is equivalent to :

A.
p $\wedge$ ($\sim$ q) $\wedge$ r
B.
($\sim$ p) $\wedge$ ($\sim$ q) $\wedge$ r
C.
($\sim$ p) $\wedge$ q $\wedge$ r
D.
p $\wedge$ q $\wedge$ ($\sim$ r)
2022 JEE Mains MCQ
JEE Main 2022 (Online) 29th June Morning Shift

Let $\Delta$ $\in$ {$\wedge$, $\vee$, $\Rightarrow$, $\Leftrightarrow$} be such that (p $\wedge$ q) $\Delta$ ((p $\vee$ q) $\Rightarrow$ q) is a tautology. Then $\Delta$ is equal to :

A.
$\wedge$
B.
$\vee$
C.
$\Rightarrow$
D.
$\Leftrightarrow$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 28th June Morning Shift

Let p, q, r be three logical statements. Consider the compound statements

${S_1}:(( \sim p) \vee q) \vee (( \sim p) \vee r)$ and

${S_2}:p \to (q \vee r)$

Then, which of the following is NOT true?

A.
If S2 is True, then S1 is True
B.
If S2 is False, then S1 is False
C.
If S2 is False, then S1 is True
D.
If S1 is False, then S2 is False
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Evening Shift

Which of the following statement is a tautology?

A.
$(( \sim q) \wedge p) \wedge q$
B.
$(( \sim q) \wedge p) \wedge (p \wedge ( \sim p))$
C.
$(( \sim q) \wedge p) \vee (p \vee ( \sim p))$
D.
$(p \wedge q) \wedge ( \sim p \wedge q))$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Morning Shift

The boolean expression $( \sim (p \wedge q)) \vee q$ is equivalent to :

A.
$q \to (p \wedge q)$
B.
$p \to q$
C.
$p \to (p \to q)$
D.
$p \to (p \vee q)$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Evening Shift

Let r $\in$ {p, q, $\sim$p, $\sim$q} be such that the logical statement

r $\vee$ ($\sim$p) $\Rightarrow$ (p $\wedge$ q) $\vee$ r

is a tautology. Then r is equal to :

A.
p
B.
q
C.
$\sim$p
D.
$\sim$q
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Morning Shift

Let $\Delta$, $\nabla $ $\in$ {$\wedge$, $\vee$} be such that p $\nabla$ q $\Rightarrow$ ((p $\Delta$ q) $\nabla$ r) is a tautology. Then (p $\nabla$ q) $\Delta$ r is logically equivalent to :

A.
(p $\Delta$ r) $\vee$ q
B.
(p $\Delta$ r) $\wedge$ q
C.
(p $\wedge$ r) $\Delta$ q
D.
(p $\nabla$ r) $\wedge$ q
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th June Evening Shift

The negation of the Boolean expression (($\sim$ q) $\wedge$ p) $\Rightarrow$ (($\sim$ p) $\vee$ q) is logically equivalent to :

A.
$p \Rightarrow q$
B.
$q \Rightarrow p$
C.
$ \sim (p \Rightarrow q)$
D.
$ \sim (q \Rightarrow p)$
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th June Morning Shift

Consider the following two propositions:

$P1: \sim (p \to \sim q)$

$P2:(p \wedge \sim q) \wedge (( \sim p) \vee q)$

If the proposition $p \to (( \sim p) \vee q)$ is evaluated as FALSE, then :

A.
P1 is TRUE and P2 is FALSE
B.
P1 is FALSE and P2 is TRUE
C.
Both P1 and P2 are FALSE
D.
Both P1 and P2 are TRUE
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Evening Shift

Consider the following statements:

A : Rishi is a judge.

B : Rishi is honest.

C : Rishi is not arrogant.

The negation of the statement "if Rishi is a judge and he is not arrogant, then he is honest" is

A.
B $\to$ (A $\vee$ C)
B.
($\sim$B) $\wedge$ (A $\wedge$ C)
C.
B $\to$ (($\sim$A) $\vee$ ($\sim$C))
D.
B $\to$ (A $\wedge$ C)
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Morning Shift

The number of choices for $\Delta \in \{ \wedge , \vee , \Rightarrow , \Leftrightarrow \} $, such that

$(p\Delta q) \Rightarrow ((p\Delta \sim q) \vee (( \sim p)\Delta q))$ is a tautology, is :

A.
1
B.
2
C.
3
D.
4
2021 JEE Mains MCQ
JEE Main 2021 (Online) 1st September Evening Shift
Which of the following is equivalent to the Boolean expression p $\wedge$ $\sim$ q ?
A.
$\sim$ (q $\to$ p)
B.
$\sim$ p $\to$ $\sim$ q
C.
$\sim$ (p $\to$ $\sim$ q)
D.
$\sim$ (p $\to$ q)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 31st August Evening Shift
Negation of the statement (p $\vee$ r) $\Rightarrow$ (q $\vee$ r) is :
A.
p $\wedge$ $\sim$ q $\wedge$ $\sim$ r
B.
$\sim$ p $\wedge$ q $\wedge$ $\sim$ 4
C.
$\sim$ p $\wedge$ q $\wedge$ r
D.
p $\wedge$ q $\wedge$ r
2021 JEE Mains MCQ
JEE Main 2021 (Online) 31st August Morning Shift
Let *, ▢ $\in${$\wedge$, $\vee$} be such that the Boolean expression (p * $\sim$ q) $\Rightarrow$ (p ▢ q) is a tautology. Then :
A.
* = $\vee$, ▢ = $\vee$
B.
* = $\wedge$, ▢ = $\wedge$
C.
* = $\wedge$, ▢ = $\vee$
D.
* = $\vee$, ▢ = $\wedge$
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Evening Shift
The Boolean expression (p $\wedge$ q) $\Rightarrow$ ((r $\wedge$ q) $\wedge$ p) is equivalent to :
A.
(p $\wedge$ q) $\Rightarrow$ (r $\wedge$ q)
B.
(q $\wedge$ r) $\Rightarrow$ (p $\wedge$ q)
C.
(p $\wedge$ q) $\Rightarrow$ (r $\vee$ q)
D.
(p $\wedge$ r) $\Rightarrow$ (p $\wedge$ q)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Morning Shift
The statement (p $ \wedge $ (p $\to$ q) $\wedge$ (q $\to$ r)) $\to$ r is :
A.
a tautology
B.
equivalent to p $\to$ $\sim$ r
C.
a fallacy
D.
equivalent to q $\to$ $\sim$ r
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Evening Shift
Consider the two statements :

(S1) : (p $\to$ q) $ \vee $ ($ \sim $ q $\to$ p) is a tautology .

(S2) : (p $ \wedge $ $ \sim $ q) $ \wedge $ ($\sim$ p $\wedge$ q) is a fallacy.

Then :
A.
only (S1) is true.
B.
both (S1) and (S2) are false.
C.
both (S1) and (S2) are true.
D.
only (S2) is true.