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PG TRB Maths Question Papers with Answers Pdf

TRB Model Questions
 
5. A square matrix A is a symmetric matrix if
 
  • A. A = -AT
  • B. A = A-T
  • C. A AT=1
  • D. A = AT
Answer: D.
A = AT
 
6. The equation x2-4xy+4y2-24x-12y+24 = 0 represents
 
  • A. A parabola
  • B. An ellipse
  • C. A circle
  • D. A hyperbola
Answer: A.
A parabola
 
 
7. Which one of the following is not composite number?
 
  • A. 6
  • B. 12
  • C. 13
  • D. 18
Answer: C.
13
 
8. The locus of a point which moves in a plane so that its distance from a fixed point bears a constant ratio, less than one, to its distance from a fixed straight line is
 
  • A. parabola
  • B. ellipse
  • C. hyperbola
  • D. rectangular hyperbola
Answer: B.
ellipse