91 . 15-5x=24-8x কে সমাধান করলে x- এর মান হবে-
- B. 2
- C. 3
- D. -3
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93 . 3x-7y+10=0 এবং y-2x-3=0 এর সমাধান ----
- A. x=1, y= -1
- B. x=1, y= 1
- C. x=-1, y= -1
- D. x=-1, y= 1
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94 . এর মান __
- A. 2
- B. 1
- C. xyz
- D. y
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97 . যদি (x-y)2=14 এবং xy=2 হলে x2+y2=কত?
- A. ১২
- B. ১৪
- C. ১৬
- D. ১৮
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98 . If x-y=2 and xy=80. What is the value of x3-y3?
- A. 520
- B. 488
- C. 380
- D. 466
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100 . If xy>0 and yz<0, which of the following must be negative?
- A. xyz
- B. xyz2
- C. zy2z
- D. xy2z2
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102 . 3x+2y=7 এবং 2x=y হলে (x,y) হবে-
- A. (2, 1)
- B. (3, 1)
- C. (1, 2)
- D. (-1, -2)
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103 . (x,y)-এর মান কত, যখন- 2x+3y=7, 5x-2y=8
- A. (2, 1)
- B. (1, 2)
- C. (3, 1)
- D. (1, 3)
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104 . If x = 2y =3z and xyz =36 , what is the value of z?
- A. 2
- B. root 2
- C. root 3
- D. 3
- E. None of them
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105 . If x = y = 2z and xyz = 256 then what is the value of x?
- A. 12
- B. 8
- C. 16
- D. 6
- E. None of them
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