1. 1. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 1 01 2013 2 25 , , - : 1 www.tnpsctamil.in 1 of 17. Download model question papers visit www.tnpsctamil.in 1 of 17.
2. 2. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 2 : 2 : 3 2 . 3 .300 ? A. 5000 B.4000 C.10000 D.1000 www.tnpsctamil.in 2 of 17. Download model question papers visit www.tnpsctamil.in 2 of 17.
3. 3. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 3 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 : www.tnpsctamil.in 3 of 17. Download model question papers visit www.tnpsctamil.in 3 of 17.
4. 4. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 4 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 www.tnpsctamil.in 4 of 17. Download model question papers visit www.tnpsctamil.in 4 of 17.
5. 5. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 5 : 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 www.tnpsctamil.in 5 of 17. Download model question papers visit www.tnpsctamil.in 5 of 17.
6. 6. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 6 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 www.tnpsctamil.in 6 of 17. Download model question papers visit www.tnpsctamil.in 6 of 17.
7. 7. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 7 : 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 www.tnpsctamil.in 7 of 17. Download model question papers visit www.tnpsctamil.in 7 of 17.
8. 8. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 8 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 www.tnpsctamil.in 8 of 17. Download model question papers visit www.tnpsctamil.in 8 of 17.
9. 9. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 9 = 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 % www.tnpsctamil.in 9 of 17. Download model question papers visit www.tnpsctamil.in 9 of 17.
10. 10. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 10 : 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 www.tnpsctamil.in 10 of 17. Download model question papers visit www.tnpsctamil.in 10 of 17.
11. 11. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 11 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 www.tnpsctamil.in 11 of 17. Download model question papers visit www.tnpsctamil.in 11 of 17.
12. 12. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 12 :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 www.tnpsctamil.in 12 of 17. Download model question papers visit www.tnpsctamil.in 12 of 17.
13. 13. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 13 :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 www.tnpsctamil.in 13 of 17. Download model question papers visit www.tnpsctamil.in 13 of 17.
14. 14. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 14 :20 . ANS : C :21 . .75000 ? A. 7,500 B. 8,000 C. 8,500 D. 9,000 Soln : = 75000 x 12/100 = 9000 www.tnpsctamil.in 14 of 17. Download model question papers visit www.tnpsctamil.in 14 of 17.
15. 15. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 15 :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- . www.tnpsctamil.in 15 of 17. Download model question papers visit www.tnpsctamil.in 15 of 17.
16. 16. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 16 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 www.tnpsctamil.in 16 of 17. Download model question papers visit www.tnpsctamil.in 16 of 17.
17. 17. TNPSC FRIENDS FACEBOOK EDUCATIONAL GROUP-MATHS MATERIAL FACEBOOK: https://www.facebook.com/AnanthaBabu.Theni Page 17 :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 www.tnpsctamil.in 17 of 17. Download model question papers visit www.tnpsctamil.in 17 of 17.