12th Standard Syllabus & Materials
12th Standard
TN 12th English Poem - 6 - Incident of the French Camp Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 6 - On the Rule of the Road Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 5 - The Chair Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Supplementary - 4 - The Midnight Visitor Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Poem - 4 - Ulysses Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 4 - The Summit Sample Question Papers Study Material - QB365 Set A

Published on: 28/06/2019
creative multiple choice questions
Download Tamil Nadu 12th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
In a square matrix the minor Mij and the co-factor Aij of and element aij are related by _____
Aij = -Mij
Aij = Mij
Aij = (-1)i+j Mij
Aij =(-1)i-j Mij
2.
If A is a non-singular matrix then IA-1| = ______
\(\left| \frac { 1 }{ { A }^{ 2 } } \right| \)
\(\frac { 1 }{ |A^{ 2 }| } \)
\(\left| \frac { 1 }{ A } \right| \)
\(\frac { 1 }{ |A| } \)
3.
If A = [2 0 1] then the rank of AAT is ______
1
2
3
0
4.
In the system of liner equations with 3 unknowns If \(\rho\) (A) = \(\rho\) ([A|B]) =1, the system has ________
unique solution
inconsistent
consistent with 2 parameter -family of solution
consistent with one parameter family of solution.
5.
In the system of equations with 3 unknowns, if Δ = 0, and one of Δx, Δy of Δz is non zero then the system is ______
Consistent
inconsistent
consistent with one parameter family of solutions
consistent with two parameter family of solutions
6.
In a homogeneous system if \(\rho\) (A) =\(\rho\) ([A|0]) < the number of unknouns then the system has ________
trivial solution
only non - trivial solution
no solution
trivial solution and infinitely many non - trivial solutions
7.
Cramer's rule is applicable only when ______
Δ ≠ 0
Δ = 0
Δ =0, Δx =0
Δx = Δy = Δz =0
8.
9.
If \(\rho\) (A) ≠ \(\rho\) ([AIB]), then the system is _____________
consistent and has infinitely many solutions
consistent and has a unique solution
consistent
inconsistent
10.
Every homogeneous system ______
Is always consistent
Has only trivial solution
Has infinitely many solution
Need not be consistent
11.
If \(\rho\) (A) = r then which of the following is correct?
all the minors of order n which do not vanish
'A' has at least one minor of order r which does not vanish and all higher order minors vanish
'A' has at least one (r + 1) order minor which vanish
all (r + 1) and higher order minors should not vanish
12.
Which of the following is not an elementary transformation?
Ri ↔️ Rj
Ri ⟶ 2Ri + Rj
Cj ⟶ Cj + Ci
Ri ⟶ Ri + Cj
13.
If \(\rho\) (A) = \(\rho\) ([A/B]) = number of unknowns, then the system is _________--
consistent and has infinitely many solutions
consistent
inconsistent
consistent and has unique solution
14.
The system of equations x + 2y + 3z = 1, x - y + 4z = 0, 2x + y + 7z = 1 has ___________
One solution
Two solution
No solution
Infinitely many solution
15.
If A is a matrix of order m \(\times\) n, then \(\rho\) (A) is _________
m
n
≤ min (m,n)
≥ min (m,n)
16.
If A =\(\left( \begin{matrix} cosx & sinx \\ -sinx & cosx \end{matrix} \right) \) and A(adj A) =\(\lambda \) \(\left( \begin{matrix} 1 & 0 \\ 0 & 1 \end{matrix} \right) \) then \(\lambda \) is ________
sinx cosx
1
2
none
17.
If the system of equations x + 2y - 3x = 2, (k + 3) z = 3, (2k + 1) y + z = 2 is inconsistent then k is ___________
-3, -\(\frac{1}{2}\)
-\(\frac{1}{2}\)
1
2
18.
If A is a square matrix of order n, then |adj A| = ______________
|A|n-1
|A|n-2
|A|n
None
19.
The system of linear equations x + y + z = 2, 2x + y - z = 3, 3x + 2y + kz = has a unique solution if __________
k ≠ 0
-1 < k < 1
-2 < k < 2
k = 0
20.
If A is a square matrix that IAI = 2, than for any positive integer n, |An| = _______
0
2n
2n
n2
21.
The number of solutions of the system of equations 2x+y = 4, x - 2y = 2, 3x + 5y = 6 is ____________
0
1
2
infinitely many
22.
If AT is the transpose of a square matrix A, then ___________
|A| ≠ |AT|
|A| = |AT|
|A| + |AT| =0
|A| = |AT| only
23.
24.
If the system of equations x = cy + bz, y = az + cx and z = bx + ay has a non - trivial solution then _____________
a2 + b2 + c2 = 1
abc ≠ 1
a + b + c =0
a2 + b2 + c2 + 2abc =1
25.
The system of linear equations x + y + z = 6, x + 2y + 3z =14 and 2x + 5y + λz =μ (λ, μ \(\in \) R) is consistent with unique solution if _________
λ = 8
λ = 8, μ ≠ 36
λ ≠ 8
none
1.
(c)
Aij = (-1)i+j Mij
2.
(d)
\(\frac { 1 }{ |A| } \)
3.
(a)
1
4.
(c)
consistent with 2 parameter -family of solution
5.
(b)
inconsistent
6.
(d)
trivial solution and infinitely many non - trivial solutions
7.
(a)
Δ ≠ 0
8.
(b)
9.
(d)
inconsistent
10.
(a)
Is always consistent
11.
(b)
'A' has at least one minor of order r which does not vanish and all higher order minors vanish
12.
(d)
Ri ⟶ Ri + Cj
13.
(d)
consistent and has unique solution
14.
(d)
Infinitely many solution
15.
(c)
≤ min (m,n)
16.
(b)
1
17.
(a)
-3, -\(\frac{1}{2}\)
18.
(a)
|A|n-1
19.
(a)
k ≠ 0
20.
(c)
2n
21.
(b)
1
22.
(b)
|A| = |AT|
23.
(b)
24.
(d)
a2 + b2 + c2 + 2abc =1
25.
(c)
λ ≠ 8
12th Standard Syllabus & Materials
12th Standard
TN 12th English Supplementary - 3 - The Hour of Truth (Play) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Poem - 3 - All the World’s a Stage Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Prose - 3 - In Celebration of Being Alive Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th English Supplementary - 2 - Life of Pi Sample Question Papers Study Material - QB365 Set A
Tamilnadu Stateboard 12th Standard Subjects

Maths

Chemistry

Physics

Biology

Computer Science

Business Maths and Statistics

Economics

Commerce

Accountancy

History

Computer Applications

Biology

Computer Technology

Computer Applications

Computer Science

Business Maths and Statistics

Commerce

Economics

Maths

Chemistry

Physics

Computer Technology

History

Accountancy

Tamil

English

French
Tamilnadu Stateboard Standards