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.

There are 40 girls in a class. Smitha who weights 50 Kgs , Leaves the class. A new girl Rashmi comes and increases the average weight by the class 1/4 . find the weight of Rashmi

Answer»

I think The QUESTION is INCOMPLETE. The INITIAL value for average is not given in the question so it is not POSSIBLE to get any numerical value of the answer.

2.

Sin 30 + tan 45 - cos 60 / sec 30 + cos 60 + cot 45 what is answer

Answer» NUMERATOR 1/2+1-1/2=1
Denominator 2/√3+1/2+1= 2/√3+3/2= 2√3/3+3/2= 4√3/6+9/6
Numerator/Denominator= 6/4√3+9
3.

If 460 is divided by a natural number, quotient is 6 more than five times the divisor and remainder is 1. Find the quotient and diviser?

Answer»

Let the divisor be X than QUOTIENT be 6+5x
now a/q we have,
DIVIDEND = divisor × quotient + remainder

4.

if five times the fifth term of an AP is equal to 8times its eighth term show that its 13th term is zero

Answer»

Let of the AP
first term= a
common difference=d
ATQ
5[a+(5-1)d]=8[a+(8-1)d]
5(a+4d)=8(a+7d)
5A + 20d = 8A + 56d
3a = 36d
a= -12d
Now 13th term
a+(13-1)d
=-12d+12d
=0
(proved)
Hope it helps
Mark me as BRAIN list

5.

Evaluate √(5-2√6)+√(10-2√21)

Answer»

Hi ,

1 ) √( 5-2√6 )

= √[ (√3 )² + ( √2 )² - 2 × √3 × √2 ]

= √ ( √3 - √2 )²

= √3 - √2 ---( 1 )

2 ) √[ 10 - 2√21 ]

= √[ ( √7 )² + ( √3 )² - 2 × √7 × √3 ]

= √ ( √7 - √3 )²

= √7 - √3 ---( 2 )

Now ,

√( 5 - 2√6 ) + √( 10 - 2√21 )

= ( 1 ) + ( 2 )

= √3 - √2 + √7 - √3

= √7 - √2

I hope this helps you.

: )

6.

Pls solve 14(ii)......ASAP!!!

Answer»

10x:11X
1x= ₹600
.: 11x= 11*6000=₹66000

7.

30,72,90,156,? with logic plzz

Answer»

I THINK the LOGIC is that first and third number is DIVISIBLE of 15 and SECOND and four divisible of 12

8.

Divide 150 into 3 parts such that second no.is five sixth the first nd third number is four fifth the number .

Answer»

Let the three part be a, b and c

GIVEN :

SUM = 150

                                   

Given part :

First part = 'X'

                                       

Second part = 5/6 of x

                    = 5x/6

                                           

Third part = 4/5 of 5x/6

                = 2x/3

                                         

To find :

We have to find

the VALUE of 'x'

                                           

As we know that sum of

three part is 150

                                         

So,

   According to the question,

\implies\dfrac{x+5x}{6}+\dfrac{2x}{3}=150\\\\\\\implies6x+5x+4x=6\times150\\\\\\\implies x=\dfrac{6\times150}{15}\\\\\\\implies\boxed{x=<klux>60</klux>}

                                           

Now we are going to

find the value of First

part, second part and

the third part. By putting

the value of 'x'.

                                       

First part = x

              = 60

Second part = 5x/6

                    = 5 × 60 / 6

                    = 50

Third part = 2x/3

                = 2 × 60 /3

               =  40

9.

If x+y=5 and xy=6 the value of (x3-y3) is

Answer»

Hey

Here is your ANSWER,

In attachment

Hope it HELPS you!

10.

If a=6-√35 then what is the value of a2+1/a2? This is a square in question.

Answer» HEY friend,
Here is the answer you were looking for:

(SOLUTION in attachment)

HOPE this helps!!!

If you have any doubt regarding to my answer, you can ask in the COMMENT section or can inbox me.

@Mahak24

Thanks...
☺☺
11.

The diagonals of rectangle ABCD intersect at 'O'.if angle BOC=68,then angle ODA=

Answer» HEY!!!!

We know diagonals of a rectangle bisect each other.

=> OA = OD

=> angle ODA = angle OAD = x
(Angle opposite equal SIDES)

Thus in ∆AOD, by angle sum property

=> x + x + 68° = 180°

=> 2X = 112°

=> x = 56°

Thus Angle ODA = 56°

Hope this helps ✌️
12.

The population of a village increased from 24500 to 25000 find the percentage increase

Answer»

Given that the POPULATION earlier was = 24500
Population now = 25000

So, INCREASE in population = 25000 - 24500 = 500

We KNOW that, 
Percentage increase in population= CHANGED population/original population *100

⇒ 500 / 24500 * 100
⇒ 500/245
⇒ 2.04%

13.

The ages of Rahul and Ravi are in the ratio 5:7. Four years later the sum of their ages will be 56 years. What is the present age of Ravi in years? (1).14 (2).21 (3).28 (4).35

Answer»

Your ANSWER is 28.
here is explanation...

after 4 year
5 x + 7 x + 4 + 4= 56
12x+8=56
12x=56-8= 48
x= 48/12=4
then age f RAHUL= 5×4=20
age of RAVI =7×4=28

14.

Write first four term of AP whose first term is -1.25 and common difference is -0.25

Answer» HEY USER here is your answer....

a= -1.25
d=-0.25

◆ First TERM--->a = -1.25
◆Second term---> a+d
=-1.25+(-0.25)
=-1.25-0.25
=-1.5

◆Third term = a+2d
=-1.25+2(-0.25)
=-1.75

◆Fourth term= a+3d
=-1.25+3(-0.25)
=-2

hope it HELPS you☺️
15.

TA and TB are tangents to a circle with centre O from an external point T. If OT intersect circle at P Prove that AP bisects angle TAB

Answer»

Hola!
________________________

[ refer above attachment. ]

Given : TA and TB are tangent to a CIRCLE with CENTRE O from point T

Consider,
ΔOAT and ΔOBT

Here,

OA = OB [Radii of circle]
OT = OT [Common side]
TA = TB [Tangents from an external point to a circle are equal in length]

∴ ΔOAT ≅ ΔOBT [By SSS CONGRUENCE criterion]

[ Exterior angle of a triangle is equal to sum of interior opposite angles. ]

Hence, in ΔAPT, ∠APO = ∠a + ∠b

In ΔAPO, OA = OP [Radii of circle]

∠OAP = ∠OPA = ∠a + ∠b ---(i) [Angles opposite to equal sides are equal]

From the FIGURE, ∠OAP=90°- ∠b ----(ii) [Since radius is perpendicular to tangent]

From equations (i) and (ii),

∠a + ∠b = 90° - ∠b

⇒ ∠a = 90° - 2∠b ---(iii)

In ΔOAT, ÐOAT + ÐAOT + ÐATO = 180° [Angle sum property of triangle]

90° + ∠a + ∠b+∠c+=180°

∠a+∠b+∠c=90°

90°- 2∠b + ∠b + ∠c=90°

- ∠b + ∠c = 0

∠b = ∠c

Hence,
AP bisects ∠TAB

________________________

Hope it helps! :D

16.

Find the value of x cube minus 8 y cube minus 36 x y- 216 when x is equal to 2 Y + 6urgentit is a polynomial question

Answer»

Your answer is 0(zero). TAKE a look at picture with the HELP of (a+b)³= a³+b³+3ab(a+b).
formula USED for (2y+6)³

17.

Samita has a recurring deposit account in a bank of rupees 2000 per month at rate of 10% pa. If she gets rupees 83100 at the time of maturity, find the total time for which the account was held.

Answer» PLEASE TELL QUESTION no from which BOOK
18.

A-1/a=b, b-1/b=c, c-1/c=a then find the value of 1/ab+1/bc+1/ca with explanation.

Answer»

I HOPE this ANSWER MAY be CORRECT

19.

Explain whether 3x12x101 + 4 is a prime number or composite number

Answer»

Heya

Prime numbers are the ONES which have only two factors 1 and itself.

It cannot be expressed as a product any other numbers.

3×12×101 + 4

4 (3×3×101 + 1)

Here the number is expressed as a products of other numbers.

Hence it is not a prime number. It is a composite number

HOPE it HELPS! ^_^

20.

If x^140 +2x^151+k is divisible by x+1 then value of k is

Answer»

Zero of ( x + 1 ) = -1.

By Remainder Theorem,

P ( x ) = x ^ 140 + 2 x ^ 151 + K

P ( 1 ) = ( -1 ) ^ 140 + 2 ( -1 ) ^ 151 + k = 0

             1 + 2 ( -1 ) + k = 0

             1 -2 + k = 0

            -1 + k = 0

              k = 1.

21.

Q. A ladder 9m long reaches a point 9m below the top of a vertical flag staff. From the foot of the ladder the elevation of the top of the flagstaff is 60degrees. Find the height of the flag staff.

Answer»

Answer:

FLAG Staff length = 16.785 m

Step-by-step explanation:

Given: Length of Ladder, CD = 9 m

           Lenght of staff from top to foor of ladder , AD = 9 m

To FIND: Lenght of flag staff, AB

In Δ BCD,

Using Trignometric Ratio,

sin\,60^{\circ}=\frac{BD}{CD}

\frac{\sqrt{3}}{2}=\frac{BD}{9}

BD=\frac{9\sqrt{3}}{2}

BD=\frac{15.57}{2}    ( using VALUE of √3 = 1.73 )

BD=7.785

⇒ AB = AD + DB

         = 9 + 7.785

         = 16.785 m

Therefore, Flag Staff length = 16.785 m

22.

If Sr denotes the sum of first r terms of an A.P.,then find S3r-Sr-1/S2r-S2r-1

Answer»

Let a is the first term and d is the COMMON DIFFERENCE of AP
∵ Sn = n/2{2a + (n - 1)d}
and \bold{S_n-S_{n-1}=T_n}
so, \bold{S_{2r} - S_{2r-1}=T_{2r}}
And \bold{S_{3r}-S_{r-1}=\frac{3r}{2}[2a+(3r-1)d]-\frac{r-1}{2}[2a+(r-2)d]}\\\\=\bold{2a[3r/2 - (r-1)/2] + d/2[(9r^2 - 3r) - (r^2-3r+2)]} \\\\=\bold{2a\frac{2r+1}{2}+d(4r^2-1)} \\\\=\bold{(2r+1)[2a+(2r-1)d]}\\\\\bold{=(2r+1).T_{2r}}

Hence, \bold{\frac{S_{3r}-S_{r-1}}{S_{2r}-S_{2r-1}}=\frac{(2r+1).T_{2r}}{T_{2r}}}
= (2r + 1)

23.

Which carpet is bigger in area – one measuring 14m in length and 12.5 m in breadth or another measuring 16m in length and 13. 8 m in breadth?

Answer»

First carpet,
AREA = length× breadth

a = l × b
a = 14 × 12.5
a = 175sq.m

Second carpet,
Area =lenght × breadth

a = l × b
a = 16 × 13.8
a = 220.8 sq.m

So the area of second carpet is larger than first carpet.
Hope this HELPS u........if it helps u mark me as BRAINLIEST.

24.

Root2xsquare+7x+5root2

Answer»

Here is your ANSWER buddy:-
√2X^2 +2x + 5x + 5√2 = 0
√2x (X +√2) +5 (x+√2)= 0
(x+√2) (√2x+5) = 0

Either (x+√2) = 0 or (√2x+5) = 0
x = -√2 or x = -5/√2

Hope it helps.

25.

Q.3. if a tower 30 m high, casts a shadow 10√3 m long on the ground, then what is the angle of elevation of the sun?

Answer»

H=30m
x=10 ROOT 3
tanA=30/10 root 3
tanA=root 3
A=60°

26.

Express -2/3 as a rational number with denominator as 12

Answer» SINCE 3*4=12 then....
\frac{ - 2}{3}  \times  \frac{4}{4}  =  \frac{ - 8}{12}
HOPE it HELPS!
27.

4m + 6n = 54 ; 3m + 2n = 28 using cramers rule

Answer»

In the attachment I have answered this problem.

I have APPLIED cramers rule to solve the given system of LINEAR equations.

SEE the attachment for detailed solution.

I hope this answer HELP you

28.

Given arithmetic progression 12,16,20,24,...find the 24th term of this progression

Answer»

A=12
d=16-12=4
n=24
using FORMULA
an=a+(n-1)d
putting the VALUES
we GET,
an=12+(24-1)4
an=12+23×4
an=12+92
an=104
So, the 24th term of this AP is 104
I HOPE THIS WILL HELP YOU MARK ME BRAINLIEST

29.

2 men and 3 women together or 4 men together can complete a piece of work in 20 days 3 men anf 3 women can finish the same work in how many days

Answer»

4M=20, =>M=4*20=80
2M=3W,
2M/3=W
3M+3W=3M+(2M*3/3)
3M+2M=5M
(M=1/80)
5M=5/80=1/16
3M and 3W can do it in 16DAYS

30.

the tree planted by Kabir is 3m high. Every month the height of the tree increases by 0.1 m. After how many months will the tree be 7/2 m tall

Answer»

Heya

Initially, the TREE was 3M high

It has to grow 7/2m = 3.5m

Growth = 3.5-3=0.5m

In one MONTH, the tree grows 0.1m

No. Of MONTHS it takes to grow to 7/2m high= 0.5/0.1=5months.

Hope it HELPS! ^_^

31.

a man travelled 60km to east of delhi then 100km to the west of it how far from delhi was he finally

Answer»

Let EAST direction be positive and west be negative.

Delhi is mean position and so let it be 0.

Since he travels 60km east,
0+60=60.

And he travels 100km west,
60-100= -40.

Negative SIGN indicates he is west of Delhi.....

THEREFORE he is 40 km west of Delhi

32.

If the zeroes of the polynomial x^2 +4x +2a are alpha and 2/alpha ,find the value of a.

Answer» HOPE U UNDERSTAND!!!!
KEEP SMILING ☺
:-)
33.

A box contains 3 white balls and 5 yellow balls

Answer»

So what we have to do BUDDY

34.

8+(-7)-(-4)=8+7-4 is it true or false

Answer» FALSE.....
8-7+4 is not EQUAL to 8+7-4
35.

What should be added to -1 to get -3/7+2

Answer»

-1+x =-3/7+2
x=-3/7+2+1
x=-3/7+3
x=-3+21/7
x=18/7.....

HOPE it WORKS

36.

900 ग्राम पनीर ₹90 का है तो 10 ग्राम पनीर कितने का होगा?

Answer» 10 ग्राम का पनीर ₹0.9 में आएगा
क्योंकि 900/90
=10
37.

I want the answer of question number 1 to 10

Answer» HELLO !


here are your answers
_______________________


ans:1.
x +y^100

ans:2.
1) quadratic
2)cubic
3)linear

ans:3.
(3x+2)=0
3x=-2
x=-2/3


ans:4.
1)P(0)
5-4x+2x^2
rearranging......

2x^2-4x+5
putting 0 in x
2(0)^2-4(0)+5
0-0+5
=5

2)2(3)^2-4(3)+5
18-12+5
6+5
11

38.

Odd man out 697,957,894,876

Answer»

The ODD ONE is 697 ....
how? SEE in the attachment⬆⬆⬆

39.

A minus b minus A square + b square factorise it

Answer»

1)-

a - b - a² - b²

1(a - b) - {(a+b) (a-b)}

(a - b) { 1 - (a+b)}

(a-b)( 1 - a -b)

2)-

9 - a² +2AB -b²

-1[ -9 +a² -2ab +b²]

-1[ -9 + (a - b)²]

9 - (a -b)²

3² - (a -b)²

[3-(a-b)] [3+(a-b)]

( 3-a +b) ( 3+a -b)

3)-

1 + 2ab - (a²+b²)

-1 [ -1 -2ab +(a²+b²)]

-1 [ -1 -2ab +a²+b²]

-1 [ -1 + (a-b)²]

1 - (a-b)²

1² - (a - b)²

[ 1 + (a -b)] [ 1 - (a -b)]

[ 1 + a -b] [ 1 -a +b]





I hope this will help you


-by ABHAY

40.

if the polynomials ax^3+3x^2-13 and 2x^2-5x+a when divided by (x-2) leaves the same remainder , find the value of a .

Answer»

F(x)= ax^3 + 3x^2 -13
G(x)=2x^2-5x+a
Now PUT x=a in f(x)
f(2)=8a+12-13→ 8a-1
Similarly g(2)=8-10+a→a-2
Now EQUATE the two reminders i.e.
8a-1=a-2
a=-1/7

41.

if x = root 3 + root 2/ root 3 - root 2 nd y =3 root - root 2 /root 3 = root 2 find the value of x square y square +xy

Answer» HEY friend,
Here is the ANSWER you were looking for:
x =  \frac{ \sqrt{3}  +  \sqrt{2} }{ \sqrt{3} -  \sqrt{2}  }

On Rationalizing the denominator we get,

x =  \frac{ \sqrt{3} +  \sqrt{2}  }{ \sqrt{3}  -  \sqrt{2} }  \times   \frac{ \sqrt{3}  +   \sqrt{2}  }{ \sqrt{3}   +   \sqrt{2} }  \\  \\

Using the identities:

{(a + b)}^{2}   =  {a}^{2}  +  {b}^{2}  + 2ab \\ (a + b)(a - b) =  {a}^{2}  -  {b}^{2}


x =  \frac{ {( \sqrt{3}) }^{2}  +  {( \sqrt{2} )}^{2} + 2( \sqrt{3})( \sqrt{2}  ) }{ {( \sqrt{3} )}^{2} -  {( \sqrt{2}) }^{2}  }  \\  \\  x =  \frac{3 + 2 + 2 \sqrt{6} }{3 - 2}  \\  \\ x = 5 + 2 \sqrt{6}  \\  \\ y =  \frac{ \sqrt{3} -  \sqrt{2}  }{ \sqrt{3}  +  \sqrt{2} }

On rationalizing the denominator we get,

y =  \frac{ \sqrt{3}  -  \sqrt{2} }{ \sqrt{3}   +  \sqrt{2} }  \times  \frac{ \sqrt{3}  -  \sqrt{2} }{ \sqrt{3}  -  \sqrt{2} }  \\

Using the identities:

{(a - b)}^{2}  =  {a}^{2}  +  {b}^{2}  - 2ab \\ (a + b)(a - b) =  {a}^{2}  -  {b}^{2}  \\

y =  \frac{ {( \sqrt{3}) }^{2}  +  {( \sqrt{2}) }^{2}  - 2( \sqrt{3})( \sqrt{2}  )}{ {( \sqrt{3} )}^{2} -  {( \sqrt{2} )}^{2}  }  \\  \\ y =  \frac{3 + 2 - 2 \sqrt{6} }{3 - 2}  \\  \\  y = 5 - 2 \sqrt{6}

Now,

Bro I GUESS you have forgot a sign in between x sq and y sq

So, for that I can solve putting both + and -

Here we go:

{x}^{2}  +  {y}^{2}   + xy \\  \\  {(5 + 2 \sqrt{6} )}^{2}  +  {(5 - 2 \sqrt{6} )}^{2}  + (5 + 2 \sqrt{6} )( 5 - 2 \sqrt{6} ) \\


Using same identities:


( {(5)}^{2}  +  {(2 \sqrt{6}) }^{2}  + 2(5)(2 \sqrt{6} )) + ( {(5)}^{2}  +  {(2 \sqrt{6}) }^{2}  - 2(5)(2 \sqrt{6}))  + (5 + 2 \sqrt{6} )(5 - 2 \sqrt{6} ) \\  \\  = (25 + 24 + 20 \sqrt{6} ) + (25 + 24 - 20 \sqrt{6} ) + ( {(5)}^{2} -  {(2 \sqrt{6} )}^{2}  ) \\  \\  = 49 + 20 \sqrt{6}  + 49  - 20 \sqrt{6}  + (25 - 24) \\  \\  = 98 + 1 \\  \\  = 99

And if the question is,


{x}^{2}   -   {y}^{2}  + xy \\  \\  = (5 + 2 \sqrt{6} )^{2}  - (5 - 2 \sqrt{6} )^{2}  + (5 + 2 \sqrt{6} )(5 - 2 \sqrt{6} ) \\  \\  = ( {(5)}^{2}  +  {(2 \sqrt{6} )}^{2}  + 2(5)(2 \sqrt{6} )) - ( {(5)}^{2}  +  {(2 \sqrt{6}) }^{2}  - 2(5)(2 \sqrt{6} )) - ( {(5)}^{2}  -  {(2 \sqrt{6}) }^{2} ) \\  \\  = (25 + 24 + 20 \sqrt{6} )  - (25 + 24 - 20 \sqrt{6} ) - (25 - 24) \\  \\  = 25 + 24 + 20 \sqrt{6}  - 25 - 24 + 20 \sqrt{6}  + 1 \\  \\  = 40 \sqrt{6}  + 1

Hope you have got your answer !!!

If you have any doubt regarding to my answer, FEEL free to ask in the COMMENT section or inbox me if needed.

@Mahak24

Thanks...
☺☺
42.

product of digits of a two-digit number is 14 when 45 is added to the number then the digits interchange their places find the number

Answer»

Let the digits of the no. be x and y

So according to the question :

x × y = 14

xy = 14

Let the two DIGIT BO. be 10x + y

10x + y + 45 = 10y + x

10x - x + y - 10y = - 45

9x - 9y = - 45

9 ( x - y ) = -45

x - y = - 5

x = -5 + y

x × y = 14

-5 + y ( y ) = 14

-5y + y^2 = 14

y^2 - 5y - 14 = 0

y^2 - 7y + 2y - 14 = 0

y ( y - 7 ) + 2 ( y - 7 )

( y + 2 ) ( y - 7 ) = 0

y = - 2 ( neglected)

or

y = 7

we cannot take a negative value so we must take y = 7

xy = 14

x × 7 = 14

x = 14 / 7

x = 2

So the required no. is 27

Hope it helps you .

43.

Find the 27th term of the following A. P. 9, 4, -1, -6, -11,....

Answer»

A27=a+26d
=9+26×-5
=9-130
=-121

44.

In natural numbers from 10 to 250 ,how many are divisible by 4

Answer»

1 to 250 ..
250/4 = 62 + 2/4
62 no DIVISIBLE
10/4 = 2 + 2/4
2 no divisible
62-2 = 60 no between 10 to 250

45.

I have my maths test tomorrow morning and I know nothing what should I do

Answer»

Just PREPARE well and give ur 100 PERCENT in the test

46.

M^+5m+5=0Plz answer me fast

Answer»

I HOPE this MAY HELP you.....!!!
THANK You..............☺️☺️☺️
✌️✌️

47.

If x is equal to 2+ root 5 then find xsquare +1/x squate

Answer»

Heya ✋

Let SEE your answer !!!

Given that

x = 2 + √5

x^2 + 1/x^2 = ?

Solution

1/x = 1/2 + √5

By rationalization

= 1 × (2 - √5)/(2 + √5) × (2 - √5)

= 2 - √5/(2)^2 - (√5)^2

= 2 - √5/4 - 5

= 2 -√5/-1

= -2 + √5

Therefore ,

x^2 + 1/x^2

= (2 + √5)^2 + (-2 + √5)^2

= (2)^2 + (√5)^2 + 2 × 2 × √5 + (-2)^2 + (√5)^2 + 2 × (-2) × √5

= 4 + 5 + 4√5 + 4 + 5 - 4√5

= 9 + 4√5 + 9 - 4√5

= 18




Thanks :)))))

48.

Factorise:25x^2-10x+1-36-y^2

Answer»

Here is UR ANSWER...

49.

How many whole numbers are there between 99 and 300?

Answer»

The number of whole NUMBERS between 99 and 300 = (300-99) - 1
= 300 - 100
= 200


here is ur ANSWER

plz BRAINLIEST my answer

50.

If 5tan alpha = 4 then find the value of 5 sin alpha - 3cos alpha\ 5sin alpha + 2cos alpha = 1/6

Answer»

In the attachment I have ANSWERED this problem.

The problem is very SIMPLE and EASY
to understand.

See the attachment for detailed SOLUTION.