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Monday, 26 October 2026
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Mathematics Past Questions and Answers

Jamb 1987 Mathematics Questions

Question 41:
An (n - 2)2 sided figure has n diagonals. Find the number n diagonals for a 25-sided figure
  • A 7
  • B 8
  • C 9
  • D 10
View Answer & Explanation
Question 42:
In the diagram, POQ is a diameter, 0 is the centre of the circle and TP is a tangent. Find the value of x
  • A 30<sup style='font-size: smaller;'>o</sup>
  • B 40<sup style='font-size: smaller;'>o</sup>
  • C 45<sup style='font-size: smaller;'>o</sup>
  • D 50<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 43:
In the diagram above, QR // TS, QR : TS = 2.3, Find the ratio of the area of triangle PQR to the area of the trapezium QRST.
  • A 4:9
  • B 4:5
  • C 1:3
  • D 2:3
View Answer & Explanation
Question 44:
Three angles of a nonagon are equal and the sum of six other angles is 1110o. Calculate the size of one of the equal angles.
  • A 210<sup style='font-size: smaller;'>o</sup>
  • B 150<sup style='font-size: smaller;'>o</sup>
  • C 105<sup style='font-size: smaller;'>o</sup>
  • D 50<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 45:
In the figure, find the value of x
  • A 110<sup style='font-size: smaller;'>o</sup>
  • B 100<sup style='font-size: smaller;'>o</sup>
  • C 90<sup style='font-size: smaller;'>o</sup>
  • D 80<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation