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Aparna Sahu
Subject: Maths
, asked on 29/4/18
Solve it:-
All the 30 students of a class took a test on Mathematics and test on English. The following table shows the result:-
Subject
Passed
Failed
Mathematics
25
5
English
22
8
Two students failed both in Mathematics and English.
47. How many students failed in only one subject?
A) 28 B) 25 C) 22 D) 9
48. How many students passed in at least one subject?
A) 28 B) 25 C) 22 D) 9
49. How many students passed in both the subjects?
A) 28 B) 25 C) 22 D) 19
Answer
4
Raj Aryan
Subject: Maths
, asked on 28/4/18
Plz find the domain fast!
Q.
y
=
cos
x
-
1
2
6
+
35
x
-
6
x
2
Answer
1
Raj Aryan
Subject: Maths
, asked on 27/4/18
S
o
l
v
e
t
h
i
s
:
F
o
r
w
h
i
c
h
w
a
s
a
,
b
,
c
,
d
w
i
l
l
f
(
x
)
=
a
x
+
b
c
x
+
d
s
a
t
i
s
f
y
f
(
f
(
x
)
)
=
x
.
A
l
s
o
f
i
n
d
w
h
i
c
h
d
o
m
a
i
n
o
f
f
(
f
(
x
)
)
.
Answer
0
Suroj Dey
Subject: Maths
, asked on 27/4/18
SOlve it quickly ITS A MULTIPLE ANSWER CORRECT TYPE:
Q
.
Given
f
x
=
1
x
2
+
2
x
+
1
3
+
x
2
-
1
3
+
x
2
-
2
x
+
1
3
and
E
=
f
1
+
f
3
+
f
5
+
.
.
.
.
.
.
.
.
.
.
.
+
f
999
,
then
-
A
Value
of
E
is
an
irrational
number
.
B
Value
of
E
is
5
C
In
the
expansion
of
1
+
E
15
7
,
greatest
term
are
T
2
and
T
3
D
The
value
of
C
k
E
is
maximum
of
k
=
3
only
.
Answer
0
Mitali
Subject: Maths
, asked on 27/4/18
Please give the solution... what is the logic to be applied in this question... kindly explain nicely...
Question No. 11
If x, y, z are prime numbers and a, b are positive integers such that L.C.M. of a, b is
x
3
y
5
z
4
. Then, the number of ordered pair (a, b) is
A. 673
B. 680
C. 683
D. 693
Answer
1
Apurva Inamdar
Subject: Maths
, asked on 25/4/18
11th question
Answer
1
Ranjan Shivam
Subject: Maths
, asked on 24/4/18
solve for x by both graphically and algebraic
Q. Solve :-
4
-
x
2
>
2
x
Answer
1
Juee Dhar
Subject: Maths
, asked on 23/4/18
The ans should be 0,9/5 ,right?? the ans given are 0,7/5. Pls clarify.
Q. Find x, when 7{x} = 2 x + 2 [x].
Answer
1
Megha Prasadan
Subject: Maths
, asked on 22/4/18
SOLVE:
24. Let S
1
={1,2,8}, S
2
={-3,0,6}, and S
3
={-1,-2,0}. If M
1
denotes the largest number in S
n
, then the smallest numbe in set {M
1
,M
2
,M
3
} is
(A) -3
(B) -2
(C) 0
(D) 1
(E) 8
Answer
1
Riya Verma
Subject: Maths
, asked on 21/4/18
Q. If p:q is the sub duplicate ratio of p-
x
2
:q-
x
2
then
x
2
is
1
.
p
p
+
q
2
.
q
p
+
q
3
.
p
q
p
+
q
4
.
n
o
n
e
o
f
t
h
e
s
e
Q. If 2s:3t is the duplicate ratio of 2s-p:3t-p then
a.
p
2
=6st
b. p=6st
c. 2p-3st
d. none of these
Answer
1
Vanshika Sharma
Subject: Maths
, asked on 21/4/18
Solve this:
Q
.
L
e
t
f
(
x
)
=
sin
x
&
g
(
x
)
=
1
-
cos
2
x
2
I
s
f
=
g
?
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
Please solve
49.
A surveyor who wanted to calculate the area of a triangular plot of land measured two sides of the plot as 486 feet and 748 feet and measured the angle between these two sides as 71.3
°
. What is the area of the triangular plot, in acres? (1 acre = 43,560 square feet)
(A) 1.3
(B) 3.4
(C) 4.0
(D) 4.2
(E) 8.3
Answer
1
Megha Prasadan
Subject: Maths
, asked on 21/4/18
How to read and solve these kind of graphs?
30.
If the two periods of the periodic function f are shown in the figure above, what is f (186)?
(
A
)
-
2
(
B
)
-
1
(
C
)
0
(
D
)
1
(
E
)
2
Answer
1
Megha Prasadan
Subject: Maths
, asked on 21/4/18
Bothe the question pls solve!:
If t<3x, then 0<y<4
49. If the above statement is true and y=5, which of the following statements must be true ?
A
t
<
3
x
B
t
≤
3
x
C
t
=
3
x
D
t
>
3
x
E
t
≥
3
x
50. A laser operation is aiming a laser at the center of a circular disk in space. The disk has a radius of 50 feet and is situated 225 miles directly above the surface of the Earth where the laser is located. If the operator makes a 0.05
o
error in aiming the laser, by how many feet will the laser beam miss the edge of the disk?
(5,280 feet = 1 mile)
(A) 937
(B) 387
(C) 1,012
(D) 1,037
(E) The laser beam will not miss the disk.
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
38. If the domain of a function f is {1,2}, which of the following CANNOT be the range of f?
(A) {1}
(B) {3}
(C) {1,2}
(D) {3,4}
(E) {1,2,3}
How to solve these kinds?
Answer
2
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Next
What are you looking for?
All the 30 students of a class took a test on Mathematics and test on English. The following table shows the result:-
47. How many students failed in only one subject?
A) 28 B) 25 C) 22 D) 9
48. How many students passed in at least one subject?
A) 28 B) 25 C) 22 D) 9
49. How many students passed in both the subjects?
A) 28 B) 25 C) 22 D) 19
Q.
Question No. 11
If x, y, z are prime numbers and a, b are positive integers such that L.C.M. of a, b is . Then, the number of ordered pair (a, b) is
A. 673
B. 680
C. 683
D. 693
Q. Solve :-
Q. Find x, when 7{x} = 2 x + 2 [x].
24. Let S1 ={1,2,8}, S2 ={-3,0,6}, and S3={-1,-2,0}. If M1 denotes the largest number in Sn, then the smallest numbe in set {M1,M2,M3} is
(A) -3
(B) -2
(C) 0
(D) 1
(E) 8
Q. If p:q is the sub duplicate ratio of p-:q- then is
Q. If 2s:3t is the duplicate ratio of 2s-p:3t-p then
a. =6st
b. p=6st
c. 2p-3st
d. none of these
49. A surveyor who wanted to calculate the area of a triangular plot of land measured two sides of the plot as 486 feet and 748 feet and measured the angle between these two sides as 71.3. What is the area of the triangular plot, in acres? (1 acre = 43,560 square feet)
(A) 1.3
(B) 3.4
(C) 4.0
(D) 4.2
(E) 8.3
30. If the two periods of the periodic function f are shown in the figure above, what is f (186)?
If t<3x, then 0<y<4
49. If the above statement is true and y=5, which of the following statements must be true ?
50. A laser operation is aiming a laser at the center of a circular disk in space. The disk has a radius of 50 feet and is situated 225 miles directly above the surface of the Earth where the laser is located. If the operator makes a 0.05o error in aiming the laser, by how many feet will the laser beam miss the edge of the disk?
(5,280 feet = 1 mile)
(A) 937
(B) 387
(C) 1,012
(D) 1,037
(E) The laser beam will not miss the disk.
(A) {1}
(B) {3}
(C) {1,2}
(D) {3,4}
(E) {1,2,3}
How to solve these kinds?