`[(?)^2+(18)^2]-:125=3. 56` (a) 11 (b) 12 (c) 14 (d) 15 (e) None of these

[(125)^(2)-:50xx20]-:25=?(a)11(b)100 (c) 150(d)250(e) None of these

6425-:125xx8=?(a)41.12(b)64.25(c)411.2 (d) 421.25 (e) None of these

7777-:77-:5=?(a)15.2(b)18.5(c)22.4 (d) 50.5(e) None of these

[(84)^(2)-:28xx12]-:24=7xx?(a)15(b)17(c)19(d)21(e) None of these

(15)^(2)+(18)^(2)-20=sqrt(?)( a) 22(b)23(c)529(d)279841 (e) None of these

18 3/4xx?-:6/(37)=1480 11 7/(12) (b) 11 4/5 (c) 12 5/(12) (d) 12 4/5 (e) None of these

If x+y=15 a n d x y=56 , then what is the value of x^2+y^2? (a) 110 (b) 113 (c) 121 (d) Cannot be determined (e) None of these

1, 2, 6, 15, 31, 56, 91 (a) 31 (b) 91 (c) 56 (d) 15

The value of (1-(1)/(3^(2)))(1-(1)/(4^(2)))(1-(1)/(5^(2)))ddot M(1-(1)/(11^(2)))(1-(1)/(12^(2))) is (11)/(20) (b) (13)/(15) (c) (13)/(18) (d) (15)/(16) (e) None of these

2(1)/(4)+1(1)/(3)-4(1)/(2)=?-1(1)/(12) (b) (11)/(12) (c) -(11)/(12)(d)1(1)/(12) (e) None of these