Home Courses Tests Questions
Hindi Version of the Questions with Green background are available only
objective Ques (69 results)
21)

If (5x + 2y) : (10x + 3y) = 5 : 9, then \((2x^2+3y^2):\) \((4x^2+9y^2) = \space ?\)

SSC CGL 2019
A)

31 : 87

B)

10 : 27

C)

16 : 47

D)

1 : 3

22)

If \(x+y+z=6\)\(xyz=-10\) and \(x^2+y^2+z^2=30\), then what is the value of \((x^3+y^3+z^3)\)?

SSC CGL 2019
A)

132

B)

135

C)

130

D)

127

23)

If \(x+{1\over16x}=3\),  then the value of \((16x^3+{1\over256x^3})\) is :

SSC CGL 2019
A)

423

B)

441

C)

432

D)

414

24)

If \(x+y+z=2, \) \(xy+yz+zx=-11\) and \(xyz=-12\), then what is the value of \(\sqrt{x^3+y^3+z^3-2} \)?

SSC CGL 2019
A)

6

B)

12

C)

9

D)

8

25)

If \(x^4-83x^2+1=0\), then a value of \((x^3-x^{-3})\) can be :

SSC CGL 2019
A)

758

B)

756

C)

739

D)

737

26)

If \((5x+1)^3+\)\((x-3)^3+\)\(8(3x-4)^3=\)\(6(5x+1)(x-3)\)\((3x-4)\), then x is equal to :

SSC CGL 2019
A)

\(5\over6\)

B)

\(1\over3\)

C)

\(2\over3\)

D)

\(3\over4\)

27)

If \(8x^3-27y^3\)\(=(Ax+By)\)\((Cx^2-Dy^2\)\(+6xy)\), then \((A+B+C-D)\) is equal to :

SSC CGL 2019
A)

-12

B)

12

C)

15

D)

9

28)

If \(x={\sqrt5-\sqrt3\over\sqrt5+\sqrt3}\) and y is the reciprocal of x, then what is the value of \((x^3+y^3)\)?

SSC CGL 2019
A)

488

B)

504

C)

472

D)

476

29)

If a = 2b = 8c and a + b + c = 13, then the value of \(\sqrt{a^2+b^2+c^2}\over2c\) is :

SSC CGL 2020
A)

\(9\over2\)

B)

\(5\over6\)

C)

\(-{9\over2}\)

D)

\(-{5\over6}\)

30)

If x,y,z are three numbers such that x + y = 13, y + z = 15 and z + x = 16, the value of \(xy +xz\over xyz\) is :

SSC CGL 2020
A)

\(5\over36\)

B)

\(18\over5\)

C)

\(5\over18\)

D)

\(36\over5\)

showing 21 - 30 results of 69 results
onlinetest practiceQue