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Recent questions in Class11
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JEEMAIN and NEET
>>
Mathematics
>>
Class11
Class11
Sets
Relations and Functions
Trigonometric Functions
Complex Numbers and Quadratic Equations
Permutations and Combinations
Bionomial Theorem and Simple Applications
Sequence and Series
Coordinate Geometry: Straight Lines
Coordinate Geometry: Conic Sections
Coordinate Geometry
3-D Geometry
Limits and Derivatives
Mathematical Reasoning
Statistics
Probability
If the numbers
1
,
x
2
,
6
−
x
2
are in GP , then value of
x
is :
jeemain
math
class11
ch9
sequences-and-series
medium
geometric-progression
q132
asked
Jan 21, 2014
by
yamini.v
1
answer
If 20 is divided into four parts which are in AP such that ratio of product of first and fourth part and product of second and third part is 2:3, then the largest part is
jeemain
math
class11
ch9
sequences-and-series
medium
arithmetic-progression
q131
asked
Jan 21, 2014
by
yamini.v
1
answer
n
∑
r
=
1
r
(
r
+
1
)
!
=
jeemain
math
class11
ch9
sequences-and-series
medium
sum-of-n-terms-of-special-series
q130
asked
Jan 21, 2014
by
yamini.v
1
answer
Sum of
1
1.2.3.4
+
1
2.3.4.5
+
1
3.4.5.6
+
.
.
.
.
.
u
p
t
o
∞
i
s
jeemain
math
class11
ch9
sequences-and-series
medium
sum-of-n-terms-of-special-series
q129
asked
Jan 21, 2014
by
yamini.v
1
answer
If
j
,
k
,
l
are in AP
p
,
q
,
r
in HP and
j
p
,
k
q
,
l
r
in
G
P
, then
p
r
+
r
p
i
s
e
q
u
a
l
t
o
:
jeemain
math
class11
ch9
sequences-and-series
medium
relationship-between-ap-and-gm
q128
asked
Jan 21, 2014
by
yamini.v
1
answer
Let
a
r
=
π
4
∫
0
t
a
n
r
x
d
x
, then
a
1
+
a
3
,
a
2
+
a
4
,
a
3
+
a
5
are in
jeemain
math
class11
ch9
sequences-and-series
medium
relationship-between-ap-and-gm
q127
asked
Jan 21, 2014
by
yamini.v
1
answer
(
1
−
2
y
)
(
1
+
3
x
+
9
x
2
+
27
x
3
+
81
x
4
+
243
x
5
+
729
x
6
)
=
(
1
−
64
y
6
)
,
(
y
≠
1
)
, then
x
y
is
jeemain
math
class11
ch9
sequences-and-series
medium
sum-of-n-terms-of-special-series
q126
asked
Jan 21, 2014
by
yamini.v
1
answer
Let
a
1
+
a
2
+
a
3
+
.
.
.
.
.
.
be terms of an AP. If
S
p
S
q
=
p
2
q
2
t
h
e
n
a
7
a
14
=
jeemain
math
class11
ch9
sequences-and-series
easy
arithmetic-progression
q125
asked
Jan 21, 2014
by
yamini.v
1
answer
If
l
,
m
,
n
are
x
t
h
,
y
t
h
a
n
d
z
t
h
term of a GP then ,
|
log
l
x
1
log
m
y
1
log
n
z
1
|
=
jeemain
math
class11
ch9
sequences-and-series
easy
geometric-progression
q124
asked
Jan 21, 2014
by
yamini.v
1
answer
If first and last term of an AP are
a
&
l
and sum of all terms is
s
, then common difference is
jeemain
math
class11
ch9
sequences-and-series
easy
arithmetic-progression
q123
asked
Jan 21, 2014
by
yamini.v
1
answer
Sum of
n
terms of AP is
6
n
2
+
5
n
while
a
m
=
164
, the value of
m
is
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q122
asked
Jan 21, 2014
by
yamini.v
1
answer
Let
S
=
3
19
+
33
(
19
)
2
+
333
(
19
)
3
+
......
∞
. Find
S
.
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q121
asked
Jan 21, 2014
by
yamini.v
1
answer
Harmonic mean of roots of equation
(
5
+
√
2
)
x
2
-
(
4
+
√
2
)
x
+
8
+
2
√
2
will be
jeemain
math
class11
ch9
sequences-and-series
easy
harmonic-progression
q120
asked
Jan 21, 2014
by
yamini.v
1
answer
Natural numbers are divided into groups
(
1
)
,
(
2
,
3
,
4
)
,
(
5
,
6
,
7
,
8
,
9
)
.
.
.
.
.
Sum of first and last term of
n
t
h
group will be :
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q119
asked
Jan 21, 2014
by
yamini.v
1
answer
If in an AP
m
times
m
t
h
term equals
n
times
n
t
h
term , then
(
m
+
n
)
t
h
term will be
jeemain
math
class11
ch9
sequences-and-series
easy
arithmetic-progression
q118
asked
Jan 21, 2014
by
yamini.v
1
answer
Let
a
n
be
n
t
h
term of AP. If
50
∑
r
=
1
a
2
r
=
p
a
n
d
50
∑
r
=
1
a
2
r
−
1
=
q
the common difference is :
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q117
asked
Jan 21, 2014
by
yamini.v
1
answer
What is the converse of the statement: n is divisible by 3, if the sum of digits of n is divisible by 3?
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q37
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the contrapositive of the statement: If
f
(
2
)
=
0
, then
f
(
x
)
is divisible by
(
x
−
2
)
?
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q36
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the converse of the statement: If
x
−
4
=
5
, then
x
=
9
?
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q35
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the contradiction of the statement: In
Δ
A
B
C
,
i
f
A
B
=
A
C
, then angles
C
=
B
?
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q34
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the negation of the statement, Rashmi is tall, and therefore, she is slim?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q33
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the negation of the statement, If it rains, the humidity increases?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q32
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Indicate the Premise2 in the following Premise1: All integers less than zero are negativenumbers. Conclusion : y is a negative number.
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q31
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which is a false statement?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q30
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which of the following is a true statement?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q29
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which counter example cannot be used to show that the statement, if n is an odd integer then n is prime is false?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q28
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which of the following statements do not convey the same meaning as, If a natural number is even then its square is also even?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q27
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
If
x
=
√
2
+
√
2
+
√
2
+
−
−
−
−
−
−
∞
a
n
d
y
=
√
2
√
2
√
2
√
2
−
−
−
−
∞
then
x
y
equals
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q116
asked
Jan 20, 2014
by
yamini.v
1
answer
Which of the following statements do not convey the same meaning as, If a triangle is equiangular then it is an obtuse angled triangle.?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q26
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Sum of series
S
=
1
2
√
1
+
1
√
2
+
1
3
√
2
+
2
√
3
+
.
.
.
.
+
1
100
√
99
+
99
√
100
i
s
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q115
asked
Jan 20, 2014
by
yamini.v
1
answer
Identify the contrapositive of the statement, If 2 is the only even prime number then 6 is divisible by 3.
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q25
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Identify the contrapositive of the statement, If 2 lines are intersecting then they are not parallel.
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q24
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Identify the converse of the statement: If x is a prime number then x is even.
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q23
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Identify the converse of the statement: If a parallelogram is a square then it is a rhombus?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q22
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Which statement represents the inverse of the statement "If it is snowing, then Skeeter wears a sweater."?
jeemain
math
mathematical-reasoning
class11
unit14
medium
implications-(tautology-contradiction.)
q21
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
If
1
4
+
2
4
+
3
4
+
.
.
.
.
.
n
4
=
a
n
5
+
b
n
4
+
c
n
3
+
d
n
2
+
e
n
+
f
, find
a
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q114
asked
Jan 20, 2014
by
yamini.v
1
answer
The statement: 5 divides 20 if 5 divides -20, in if-then form would be
jeemain
math
mathematical-reasoning
class11
14
medium
statements
q20
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Sum of series
(
n
)
(
n
)
+
(
n
−
1
)
(
n
+
1
)
+
(
n
−
2
)
(
n
+
2
)
+....+
1
(
2
n
−
1
)
is
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q113
asked
Jan 20, 2014
by
yamini.v
1
answer
The statement: 24 is divisible by 6 if 25 is a multiple of 5, in if-then form would be
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q19
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
The statement: A rectangle is a square if all the 4 sides are equal, in if-then form would be
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q18
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the negation of: For every real number
x
,
x
>
x
+
2
?
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q17
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
In which of the following statements is the OR inclusive?
jeemain
math
mathematical-reasoning
class11
ch14
medium
logical-operations-(and-or)
q16
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
In which statement is the OR exclusive?
jeemain
math
mathematical-reasoning
class11
ch14
medium
logical-operations-(and-or)
q15
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
Sum of series
∑
n
r
=
1
r
l
o
g
r
+
1
r
is :
jeemain
math
class11
ch9
sequences-and-series
easy
sum-of-n-terms-of-special-series
q112
asked
Jan 20, 2014
by
yamini.v
1
answer
If
t
and
c
denote a tautology and a contradiction respectively, then for any statement
p
,
p
∧
t
is equal to
jeemain
math
mathematical-reasoning
class11
ch14
medium
implications-(tautology-contradiction.)
q14
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
If p : Nidhi is a girl and q : Anurag is a boy, then the statement: Nidhi is a girl and Anurag is a boy, is written in symbols as
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q13
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
What is the negation of: Ram is in class X or Rashmi is in class XII?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q12
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
"If Deb and Sam go to the mall, then it is snowing." Which statement below is logically equivalent?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q11
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
If
a
1
,
a
2
,
.
.
.
a
n
are in HP. , Then
a
1
a
2
+
a
2
a
3
+
.
.
.
.
.
+
a
n
a
n
−
1
is equal to
jeemain
math
class11
ch9
sequences-and-series
easy
relationship-between-ap-and-gm
q111
asked
Jan 20, 2014
by
yamini.v
1
answer
If Susan does not like spinach, what is the truth value of the statement "Susan likes ice cream and she like spinach."?
jeemain
math
mathematical-reasoning
class11
ch14
medium
statements
q10
asked
Jan 20, 2014
by
thanvigandhi_1
1
answer
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