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Mathematics 1982 JAMB Past Questions

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41
The arithmetic mean of the ages of 30 pupils in a class is 15.3 years. One boy leaves the class and one girl is enrolled, and the new average age of 30 pupils in the class becomes 15.2 years. How much older is the boy than the girl?
  • A. 30 years
  • B. 6 years
  • C. 9 years
  • D. 3 years
  • E. 1 year
View Answer & Discuss (1) JAMB 1982
42
In the diagram, angle QPR = 90o, angle PSR = 90o and PR = 5 units. Find the length of QS.
  • A. 5 tan 25o sin 65o
  • B. 5 cos 25o sin 65o
  • C. 5 tan 25o cos 65o
  • D. cos 25o cos 65o
  • E. 5 cosec 25o
View Answer & Discuss (5) JAMB 1982
43

The diagram is the distance time graph of a vehicle. Find its average speed in kilometers per hour during the journey

  • A. 155km/hr
  • B. 50km/hr
  • C. 40km/hr
  • D. 124km/hr
  • E. 84km/hr
View Answer & Discuss (2) JAMB 1982
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44
In the fiqure where PQRTU is a circle, ISTI = IRSI and angle TSR = 52o. Find the angle marked m
  • A. 128o
  • B. 52o
  • C. 104o
  • D. 64o
  • E. 116o
View Answer & Discuss (3) JAMB 1982
45
If K is a constant, which of the following equations best describes the parabola?
  • A. y = kx2
  • B. x = y2 - k
  • C. y = k - x2
  • D. x2 = y2 - k
  • E. y = (k - x)2
View Answer & Discuss (6) JAMB 1982
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