Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Using properties of determinants, prove that ∣∣∣∣∣(x+y)2zxzyzx(z+y)2xyzyxy(z+x)2∣∣∣∣∣=2xyz(x+y+z)3

Answer» Using properties of determinants, prove that

(x+y)2zxzyzx(z+y)2xyzyxy(z+x)2

=2xyz(x+y+z)3
2.

Solve for x : −3x+5<101

Answer»

Solve for x : 3x+5<101

3.

If a and b are the position vectors of two points A and B and C is a point on AB produced such that AC = 3AB, then position vector of C will be

Answer»

If a and b are the position vectors of two points A and B and C is a point on AB produced such that AC = 3AB, then position vector of C will be


4.

A straight line L1:xa+yb=1 intersects the x-axis and y-axis at P and Q respectively and a straight line L2 perpendicular to L1 cuts the x-axis and y-axis at R and S respectively. The locus of the point of intersection of the lines PS and QR is

Answer»

A straight line L1:xa+yb=1 intersects the x-axis and y-axis at P and Q respectively and a straight line L2 perpendicular to L1 cuts the x-axis and y-axis at R and S respectively. The locus of the point of intersection of the lines PS and QR is

5.

Find the following integrals. ∫(2x−3cosx+ex)dx.

Answer»

Find the following integrals.
(2x3cosx+ex)dx.

6.

If ∫1+cosxcosx−cos2xdx=log|secx+tanx|−2f′(x)+C, then the function f(x) is

Answer»

If 1+cosxcosxcos2xdx=log|secx+tanx|2f(x)+C, then the function f(x) is

7.

A divisor of N= 253453 is selected at random. The probability that the selected number is divisible by 200 if it is known that it is divisible by 100 is A) 3/4 B) 1/2 C) 1/4 D) 4/5

Answer»

A divisor of N= 253453 is selected at random. The probability that the selected number is divisible by 200 if it is known that it is divisible by 100 is

A) 3/4 B) 1/2 C) 1/4 D) 4/5

8.

Each student in a class of 40, studies at least one of the subjects English, Mathematics and Physics. 16 study English, 22 study Physics and 26 study Mathematics, 5 study English and Physics, 14 Mathematics and Physics and 2 study all the three subjects. The number of students who study English and Mathematics but not Physics is

Answer»

Each student in a class of 40, studies at least one of the subjects English, Mathematics and Physics. 16 study English, 22 study Physics and 26 study Mathematics, 5 study English and Physics, 14 Mathematics and Physics and 2 study all the three subjects. The number of students who study English and Mathematics but not Physics is

9.

Each coefficient in the equation ax2+bx+c=0 is determined by throwing an ordinary die. Find the probability that the equation will have equal roots.

Answer»

Each coefficient in the equation ax2+bx+c=0 is determined by throwing an ordinary die. Find the probability that the equation will have equal roots.


10.

If α,β and γ are the real roots of the equation x3+5x2+9x−6=0. Find the value of α2+β2+γ2.__

Answer» If α,β and γ are the real roots of the equation x3+5x2+9x6=0. Find the value of α2+β2+γ2.
__
11.

How to prove them symmetric and transitive ?

Answer» How to prove them symmetric and transitive ?
12.

Integrate the following functions. ∫5x−21+2x+3x2dx.

Answer»

Integrate the following functions.
5x21+2x+3x2dx.

13.

Value of (1 +cosπ/8)(1 +cos3π/8)(1 +cos5π/8)(1 +cos7π/8)

Answer» Value of (1 +cosπ/8)(1 +cos3π/8)(1 +cos5π/8)(1 +cos7π/8)
14.

Calculate the mean deviation about the median for the following data. Marks0−1010−2020−3030−4040−5050−6060−7070−80No. of students1816151210522

Answer» Calculate the mean deviation about the median for the following data.
Marks0101020203030404050506060707080No. of students1816151210522
15.

It is known that 10% of certain articles manufactured are defective, what is the probability that in a random sample of 12 such articles, 9 are defective?

Answer»

It is known that 10% of certain articles manufactured are defective, what is the probability that in a random sample of 12 such articles, 9 are defective?

16.

a+ar+ar2+⋯+arn−1=a(rn−1)r−1

Answer»

a+ar+ar2++arn1=a(rn1)r1

17.

The range of k for which |x2−1|=k has exactly two solutions is

Answer»

The range of k for which |x21|=k has exactly two solutions is

18.

If 6n−5n, n∈N is divided by 25, then the remainder is

Answer»

If 6n5n, nN is divided by 25, then the remainder is

19.

In a class of 42 students, 23 are studying Mathematics, 24 are studying Physics, 19 are studying Chemistry. If 12 are studying both Mathematics and Physics, 9 are studying both Mathematics and Chemistry, 7 are studying both Physics and Chemistry and 4 are studying all the three subjects, then the number of students studying exactly one subject, is

Answer»

In a class of 42 students, 23 are studying Mathematics, 24 are studying Physics, 19 are studying Chemistry. If 12 are studying both Mathematics and Physics, 9 are studying both Mathematics and Chemistry, 7 are studying both Physics and Chemistry and 4 are studying all the three subjects, then the number of students studying exactly one subject, is

20.

In a class with 35 women and 25 men, 25% of the women are business majors. Find the probability that a student chosen from the class at random is a female business major.

Answer»

In a class with 35 women and 25 men, 25% of the women are business majors. Find the probability that a student chosen from the class at random is a female business major.


21.

limx→0sinax+bxax+sinbx

Answer»

limx0sinax+bxax+sinbx

22.

If x2+px + q = 0 is the quadratic equation whose roots are a – 2 and b – 2 where a and b are the roots of x2 - 3x + 1 =0, then

Answer»

If x2+px + q = 0 is the quadratic equation whose roots are a – 2 and b – 2 where a and b are the roots of x2 - 3x + 1 =0, then


23.

The two adjacent sides of a parallelogram are 2^i−4^j+5^k and ^i−2^j−3^k. Find the unit vector parallel to its diagonal. Also, find its area.

Answer»

The two adjacent sides of a parallelogram are 2^i4^j+5^k and ^i2^j3^k. Find the unit vector parallel to its diagonal. Also, find its area.

24.

A box contains 25 tickets numbered 1, 2, ....... 25. If two tickets are drawn atrandom then the probability that the product of their numbers is even, is

Answer»

A box contains 25 tickets numbered 1, 2, ....... 25. If two tickets are drawn at

random then the probability that the product of their numbers is even, is


25.

From a well shuffled deck of 52 cards, 4 cards are drawn at random. What is the probability that all the drawn cards are of the same colour.

Answer»

From a well shuffled deck of 52 cards, 4 cards are drawn at random. What

is the probability that all the drawn cards are of the same colour.

26.

A particle P starts from the point z0=1+2i , where i=√−1 It moves first horizontally away from origin by 5 units and then vertically away from origin by 3 units to reach a point z1. From z1 the particle moves √2 units away from origin in the direction of x=y and then it moves through an angle π/2 in anticlockwise direction on a circle with centre at origin to reach a point z2. Then point z2 is given by

Answer»

A particle P starts from the point z0=1+2i , where i=1 It moves first horizontally away from origin by 5 units and then vertically away from origin by 3 units to reach a point z1. From z1 the particle moves 2 units away from origin in the direction of x=y and then it moves through an angle π/2 in anticlockwise direction on a circle with centre at origin to reach a point z2. Then point z2 is given by

27.

(a) A factory manufactures two types of screws, A and B. Each type of screw requires the use of two machines, an automatic and a hand operated. It takes 4 minutes on the automatic and 6 minutes on hand operated machines to manufacturer a package of screw A, while it takes 6 minutes on automatic and 3 minutes on the hand operatedmachines to manufacture a package of screw B. Each machine is available for at the most 4 hours (240minutes) on any day. The manufacturer can sell a package of screws A at a profit of Rs 7 and screws B at a profit of Rs.10. Assuming that he can sell all the screws he manufactures, how many packages of each type should the factory owner produce in a day in order to maximize his profit? Determine the maximum profit. (b)Prove that∣∣∣∣1+a1111+b1111+c∣∣∣∣=abc(1+1a+1b+1c)=abc+bc+ca+ab

Answer»

(a) A factory manufactures two types of screws, A and B. Each type of screw requires the use of two machines, an automatic and a hand operated. It takes 4 minutes on the automatic and 6 minutes on hand operated machines to manufacturer a package of screw A, while it takes 6 minutes on automatic and 3 minutes on the hand operatedmachines to manufacture a package of screw B. Each machine is available for at the most 4 hours (240minutes) on any day. The manufacturer can sell a package of screws A at a profit of Rs 7 and screws B at a profit of Rs.10. Assuming that he can sell all the screws he manufactures, how many packages of each type should the factory owner produce in a day in order to maximize his profit? Determine the maximum profit.

(b)Prove that
1+a1111+b1111+c
=abc(1+1a+1b+1c)=abc+bc+ca+ab

28.

The domain of the function f(x)=11−{x} is (where {.} denotes the fractional part of x)

Answer»

The domain of the function f(x)=11{x} is
(where {.} denotes the fractional part of x)

29.

The first term of an A.P. is 2 and the last term is 50. The sum of all these terms is 442. Find the common difference.

Answer»

The first term of an A.P. is 2 and the last term is 50. The sum of all these terms is 442. Find the common difference.

30.

The value of ∫2−1|x|x dx is

Answer»

The value of 21|x|x dx is


31.

4x+32x−3&lt;6

Answer»

4x+32x3<6

32.

If x=tan−117 and y=tan−113, then

Answer»

If x=tan117 and y=tan113, then


33.

If A lies in second quadrant and 3 and A=4=0, then the value of 2 cot A -5 cos A =sin A is equal to

Answer»

If A lies in second quadrant and 3 and A=4=0, then the value of 2 cot A -5 cos A =sin A is equal to


34.

Plane ax+by+cz=1 intersects axes in A,B,C respectively. If G(16,−13,1) is a centroid of ΔABC, then a+b+3c=_____

Answer»

Plane ax+by+cz=1 intersects axes in A,B,C respectively. If G(16,13,1) is a centroid of ΔABC, then a+b+3c=_____

35.

If L || M and M || N, then what can be said about L and N?

Answer»

If L || M and M || N, then what can be said about L and N?


36.

If the distance between the points (5,−2) and (1,a) is 5 units, then the sum of all possible values(s) of a is

Answer»

If the distance between the points (5,2) and (1,a) is 5 units, then the sum of all possible values(s) of a is

37.

The maximum slope of the curve y=12x4−5x3+18x2−19x occurs at the point :

Answer»

The maximum slope of the curve y=12x45x3+18x219x occurs at the point :

38.

Let A(θ) and B(ϕ) are the parametric ends of a chord of the hyperbola x2144−y225=1. If the equation of AB is 2x+3y=1, then

Answer»

Let A(θ) and B(ϕ) are the parametric ends of a chord of the hyperbola x2144y225=1. If the equation of AB is 2x+3y=1, then

39.

Minimum of y if y=|x|−|x+1|+|x+2|−…+|x+2016| is

Answer» Minimum of y if
y=|x||x+1|+|x+2|+|x+2016| is
40.

The complete solution set of sinx−√3cosx=0 is

Answer»

The complete solution set of sinx3cosx=0 is

41.

Find the particular solution of the differential equation (x−y)dydx=(x+2y), given that y=0 when x=1.

Answer» Find the particular solution of the differential equation (xy)dydx=(x+2y), given that y=0 when x=1.
42.

If log10a12=log10b21=log10c15, then bc is equal to

Answer»

If log10a12=log10b21=log10c15, then bc is equal to

43.

A card is drawn at random from a well-shuffled deck of 52 cards. Find the probability of its being a spade or a king.

Answer»

A card is drawn at random from a well-shuffled deck of 52 cards. Find the probability of its being a spade or a king.

44.

If x1+x2+x3+x4+x5=6, then the difference between the number of non negative integral solutions and the number of positive integral solutions will be

Answer» If x1+x2+x3+x4+x5=6, then the difference between the number of non negative integral solutions and the number of positive integral solutions will be
45.

Prove that 9π8−94sin−1(13)=94sin−1(2√23)

Answer»

Prove that 9π894sin1(13)=94sin1(223)

46.

For the question verify that the given function (explicit or implicit) is a solution of the corresponding differential equation. y=ex+1 and y''-y'=0.

Answer»

For the question verify that the given function (explicit or implicit) is a solution of the corresponding differential equation.

y=ex+1 and y''-y'=0.

47.

If α+β−γ=π then sin2α+sin2β−sin2γ is equal to

Answer»

If α+βγ=π then sin2α+sin2βsin2γ is equal to


48.

The equation of the circle concentric with x2−3x+4y−c=0 and passing through (-1, -2) is

Answer»

The equation of the circle concentric with x23x+4yc=0 and passing through (-1, -2) is


49.

Prove that ∣∣∣∣111abca3b3c3∣∣∣∣=(a−b)(b−c)(c−a)(a+b+c)

Answer»

Prove that

111abca3b3c3
=(ab)(bc)(ca)(a+b+c)

50.

The first and last term of an AP are 1 and 11 if the sum of its terms is 36 then a = ______,d=_____,n=_____&amp;a5=_________

Answer»

The first and last term of an AP are 1 and 11 if the sum of its terms is 36 then a = ______,d=_____,n=_____&a5=_________