Jamb 1979 Mathematics Questions
Question 46:
In the figure, PQ and QR are chords of the circle PQR. QRS is a straight line and PR is equal to RS, < PSR is 20o. What is the size of
- A 70<sup style='font-size: smaller;'>o</sup>
- B 90<sup style='font-size: smaller;'>o</sup>
- C 80<sup style='font-size: smaller;'>o</sup>
- D 40<sup style='font-size: smaller;'>o</sup>
- E 60<sup style='font-size: smaller;'>o</sup>
Question 47:
In the figure, PQ is parallel to SQ ; QS bisets < PSQ, < PQS is 65o and < RPS is 20o. What is the size of < PRS?
- A 45<sup style='font-size: smaller;'>o</sup>
- B 35<sup style='font-size: smaller;'>o</sup>
- C 40<sup style='font-size: smaller;'>o</sup>
- D 30<sup style='font-size: smaller;'>o</sup>
- E 42<sup style='font-size: smaller;'>o</sup>
Question 48:
(Numbers indicate the lengths of the sides of the triangles) If the area of \(\bigtriangleup\) PQR is k2sq. units what is the area of the shades portion?
- A \(\frac{5}{9}\)k<sup style='font-size: smaller;'>2</sup> sq. units
- B \(\frac{1}{3}\)k<sup style='font-size: smaller;'>2</sup> sq. units
- C \(\frac{8}{9}\)k<sup style='font-size: smaller;'>2</sup> sq. units
- D \(\frac{7}{9}\)k<sup style='font-size: smaller;'>2</sup> sq. units
- E \(\frac{2}{3}\)k<sup style='font-size: smaller;'>2</sup> sq. u
Question 49:
In the parallelogram PQRS, PE is perpendicular to QR. Find the area of the parallelogram.
- A 60cm<sup style='font-size: smaller;'>2</sup>
- B 65cm<sup style='font-size: smaller;'>2</sup>
- C 72cm<sup style='font-size: smaller;'>2</sup>
- D 144cm<sup style='font-size: smaller;'>2</sup>
- E 156cm<sup style='font-size: smaller;'>2</sup>
Question 50:
PQ is parallel to RS. Calculate the value of x.
- A 20<sup style='font-size: smaller;'>o</sup>
- B 40<sup style='font-size: smaller;'>o</sup>
- C 60<sup style='font-size: smaller;'>o</sup>
- D 80<sup style='font-size: smaller;'>o</sup>
- E 100<sup style='font-size: smaller;'>o</sup>