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CuriousTab

Simplification problems


  • 1. If x = 4aba+b , then what is the value of x+2ax-2a+x+2bx-2b ?

  • Options
  • A. 0
  • B. 2
  • C. 4
  • D. 1
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  • 2. In a triangle PQR, ?Q = 90°. If PQ = 12 cm and QR = 5 cm, then what is the radius (in cm) of the circum circle of the triangle?

  • Options
  • A. 5
  • B. 6
  • C. 6.5
  • D. 6?2
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  • 3. P is a point outside the circle at distance of 6.5 cm from centre O of the circle. PR be a secant such that it intersects the circle at Q and R. If PQ = 4.5 cm and QR = 3.5 cm, then what is the radius (in cm) of the circle?

  • Options
  • A. 1.5
  • B. 2
  • C. 2.5
  • D. 3
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  • 4. If tan ? + cot ? = x, then what is the value of tan4? + cot4? ?

  • Options
  • A. (x3 ? 3)2 + 2
  • B. (x4 ? 2x) + 4
  • C. x2 (x2 ? 4) + 2
  • D. x
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  • 5. If tan2? + cot2? = 2 , then what is the value of 2sec ? cosec ? ?

  • Options
  • A. 0
  • B. 1
  • C. 2
  • D. 4
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  • 6. The value of (0.3)2/100= ?

  • Options
  • A. 0.09
  • B. 0.0009
  • C. 0.009
  • D. 0.9
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  • 7. If x/y = 4/9, then what is the value of (7x2 ? 19xy + 11y2)/y2 ?

  • Options
  • A. 59/81
  • B. 100/27
  • C. 319/81
  • D. 913/81
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  • 8. If x ? 3 + [1/(x ? 3)] = 4, what is the value of [(x ? 3)3+ [1/(x ? 3)3] ?

  • Options
  • A. 14
  • B. 18
  • C. 52
  • D. 76
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  • 9. If x2+ y2+ z2= xy + yz + zx , then what is the value of (7x + 3y ? 5z)/5x?

  • Options
  • A. 0
  • B. 1
  • C. 5
  • D. 33/5
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  • 10. If sum of the areas of the circumcircle and the incircle of an equilateral triangle is 770 cm2, then what is the area (in cm2) of the triangle?

  • Options
  • A. 125?3
  • B. 147?3
  • C. 156?3
  • D. 169?3
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