`(24+25+26)^2-(10+20+25)^2=?` 352 (b) 400 (c) 752 (d) 2600 None of these

(24+25+26)^(2)-(10+20+25)^(2)=?352 (b) 400(c)752(d)2600None of these

(55.25)^(2)-637.5625=? (a) 25.25 (b) 625 (c) 1375 (d) 2415 (e) None of these

[(125)^(2)-:50xx20]-:25=?(a)11(b)100 (c) 150(d)250(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

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

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

(833.25-384.45)-:24=?(a)1.87(b)2.01(c)18.7(d)20.1(e)None of these

A rational number equal to (-2)/3 is (a) (-10)/(25) (b) (10)/(-15) (c) (-9)/6 (d) None of these

A rational number equal to (-2)/3 is (a) (-10)/(25) (b) (10)/(-15) (c) (-9)/6 (d) None of these

A body has a charge of -2 µC. If it has 2.5 x 10^13 protons, then how many electrons the body has? (a) 1.25 x 10^13 (b) 2.5 x 10^13 (c) 3.75 x 10^13 (d) None of these