TNPSC Group 2 General Knowledge Exam Study Materials Book in Tamil

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: 2

: 3

2

. 3

.300

?

A. 5000 B.4000

C.10000 D.1000





Soln :

n = 2

LOGIC :

Pn/100(r+3-r) = 300

3Pn/100 = 300

P = (300 * 100 ) / ( 3 * 2 )

P = 5000

= 5000 .

: 4

A B 10 , B C

15 , C A 18

B

?

A. 30 B. 20

C. 12 D. 18

Soln :





A , B

A + B = 1/10 .Eqn.1

B , C

B + C = 1/15 .Eqn.2

C , A

C + A = 1/18 .Eqn.3

Eqn.1 + Eqn.2 => A + B +C + A = 1/10 + 1/18

2A + B + C = 14/90 = 7/45

2A + B + C = 7/45 .Eqn.4

Substitute Eqn.2 in Eqn.4 => 2A + 1/15 = 7/45

2A = 7/45 1/15

2A = 4/45

=> A = 2/45

Sustitute A value in Eqn.1 => 2/45 + B = 1/10

B = 1/10 2 /45

B B = 1/18

Hence ,

B = 18

[ : , ]

: 5

LABOUR KBAPTS , CANDID

?

L-1=K A+1=B B-1=A O+1=P U-1=T R+1=S Likewise LABOUR = BBMEHE

ANS : BBMEHE





: 6

25

?

A. 50 % B. 25 %

C. 56.25 % D. 46.25 %

Soln :

= 100

= r^2 = * 100 * 100

= 10000 .

25% = 125 .

= * 125 * 125

= 15625 . .

= 15625 - 10000 . .

= 5625 . .

= 5625/10000 * 100

= 56.25 %

: 7

28 , 5:2

. 2

? A. 2:1 B. 1:2 C. 2:3 D. 1:3





Soln :

28 .

5:2 .

5+2=7

28/7=4

4 * 5 : 4 * 2 = 20 : 8

20 , 8 .

2 ,

20 10 .

= 20 : 10

= 2 : 1

: 8

A,B,C 4 . A

12 , B 18 , C

?

A. 10

B. 12

C. 9

D. 18 Soln:

A , B , C : A + B + C = 1/4

A B

C .

A + B + C A B = 1/4 1/12 1/18 = 4/36 = 1/9

C = 9





: 9

Explanation :

ANS: 8

: 10

X- 5 Y- 15

, 10 Y- 20 Z-

. Z- .3000 , X , Y

Z ?

A. .18000

B. .12000

C. .27000

D. .16000





Soln :

Z= 3000 [Given]

X- 5 Y- 15

. X * 5/100 = Y * 15/100 -------Eqn.1

10 Y- 20 Z- . Y * 10/100 = Z * 20/100 --------Eqn.2 Substitute Z value in Eqn.2 => Y * 10/100 = 3000 * 20/100

=> y = 6000 Substitute Y Value in Eqn.1 => X * 5/100 = 6000 * 15/100

=> X = 18000

:

X + Y + Z = 18000 + 6000 + 3000 = 27000

: 11

2004 2005

.

A. 20 % B . 50 % C. 66.66 % D. 71.66 % Soln:

2004 = 30

2005 = 50





= 50 - 30

= 20

= 20,00,000 * 100 30,00,000 = 66.66 %

: 12

20 5 1

.

? A. 16.66 % B. 15 % C. 20 % D. 16 % Soln :

5 = 5000

5 20 % = 5000 * 20/100

= 1000 ..

= 1 .

5 1

= 5 + 1 = 6

.

6 1

= 1/6 * 100 = 100/6 = 16.66 %





: 13

12 10

? A. 18 % B. 16.66 % C. 20% D. 25 % Soln:

12 = .100

10 = .100

1 = 100 / 10 = .10

12 = 12 * 10 = .120

= 120 - 100 = 20 .

= 20/100 * 100 = 20 %

: 14

P Q - 2:3 ,

8 ,

P- ? A. 16 B. 24 C. 12 D. 30 Soln :

P Q - = 2x:3x

P Q- = 8





3x-2x=8

x= 8

P- = 2 * 8 = 16 [.A]

Q- = 3 * 8 = 24

: 15

A B- 3 , B C- 4 .680-

,

A. 160, 40, 480

B. 480, 160, 40

C. 480, 40, 160

D. 160, 480, 40 Soln : A = 3B & B = 4C [Given]

A- = x .

A = 3B , B- =A/3=x/3

B = 4C , C- = B / 4 = x / ( 3 * 4 ) = x / 12

A- + B- + C- = 680

x + x/3 + x/12 = 680 (12x + 4x + x) /12 = 680

17x = 680 * 12 x = 480

A- = x = 480

B- = x/3 = 480/3 = 160

C- = x/12= 480/12= 40

Ans : 480 , 160 , 40





:16

, 12

, 9 6 . 1.5

? A. 1072 B. 648 C. 324 D. 192

Soln:

= x x

= 12 x 9 x 6

= 648 ^3

= ()^3

= (1.5)^3

=3.375 ^3

= /

= 648/3.375

= 192

:17

.

ANS : D





:18

A- B- 25 , B- A- ? A. 50 % B. 45 % C. 22.33 % D. 33.33 % Soln :

A- = 100

B- = 75

B- A- =(25/75)x100 = 33.33 %

:19

A,B,C,D E - C- .100 . A- C- . B- . E- C- . D- , ? 1. B 2. C 3. D 4. E Soln:

C - = 100

,

B < A < C

C < E < D

,

= D





:20

.

ANS : C

:21

.

.75000

? A. 7,500 B. 8,000 C. 8,500 D. 9,000

Soln :

= 75000 x 12/100

= 9000





:22

A , B , C

. A 252

, B 308 .

?

A. 20 18

b. 40 20

c. 46 12

d. 30 Soln :

252- , 308- ... .

252- , 308- ... = 2772

1 60

= 2772/60 = 46 , 12 ,

,

46 12

:23

, 2112 2792

? A. 63 B. 64 C. 68 D. 78

Soln :

4 .

4- .





2112-4=2108

2792-4=2788

... .

2108 2788 ... = 68 .

: 68

:24

.800 3 .920 .

3

3 ? A. 1,092 B. 992 C. 1,882 D. 1,182

Soln: Formula:

, i = (Pnr)/100

r = (i x 100)/(Pn)

, i = 920 800 = 120

, r = (120 x 100)/(800 x 3 ) = 5 %

3 , 5 + 3 = 8 %

, i = 800 x 3 x 8 / 100 = 192

3 = 800 + 192

= 992





:25

. 414 15

?

A. .400

B. .314

C. .326

D. .360

Soln:

= X

,

+ =

X + X * 15/100 = 414

X + 3X/20 = 414

(20X+3X)/20 = 414

=> X = 360

= 360



TNPSC Group 2 General Knowledge Exam Study Materials Book in Tamil

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