If `25 a+25 b=115` , what is the average of `a` and `b` ? (a) 2.5 (b) 3.4 (c) 4.5 (d) 4.6 (e) None of these

786-:24xx?=6.55(a)0.2(b)0.4(c)4(d)5(e) None of these

(0.05xx6.25)-:2.5=?(a)0.95(b)0.105 (c) 0.115 (d) 1.25 (e) None of these

5(2)/(3)-:?(5)/(6)=2(a)2(b)3(c)4(d) None of these

(550% of 250)/275=? a.15 b.0.5 c.1.5 d.2.5 e.none of these

The coefficient of x^6 in series e^(2x) is 4/(25) b. 3/(45) c. 2/(45) d. None of these

If a , b , c , d , e are five consecutive odd numbers, their average is (a) 5(a+4) (b) (a b c d e)/5 (c) 5(a+b+c+d+e) (d) None of these

If (a-b)=4 and ab=2, then (a^(2)+b^(2))=?( a) 18(b)20(c)25 (d) None of these

If acostheta+bsintheta=4 and asintheta-bcostheta=3 , then a^2+b^2 = (a) 7 (b) 12 (c) 25 (d) None of these

A B C is an isosceles triangle. If the coordinates of the base are B(1,3) and C(-2,7) , the coordinates of vertex A can be (a) (1,6) (b) (-1/2,5) (c) (5/6,6) (d) none of these

12% as a fraction is (a) 3/(25) (b) 4/(25) (c) 3/(20) (d) 6/(25)