Jamb 1982 Mathematics Questions
Question 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
Question 42:
In the diagram, angle QPR = 90o, angle PSR = 90o and PR = 5 units. Find the length of QS.
- A 5 tan 25<sup style='font-size: smaller;'>o</sup> sin 65<sup style='font-size: smaller;'>o</sup>
- B 5 cos 25<sup style='font-size: smaller;'>o</sup> sin 65<sup style='font-size: smaller;'>o</sup>
- C 5 tan 25<sup style='font-size: smaller;'>o</sup> cos 65<sup style='font-size: smaller;'>o</sup>
- D Cos 25<sup style='font-size: smaller;'>o</sup> cos 65<sup style='font-size: smaller;'>o</sup>
- E 5 cosec 25<sup style='font-size: smaller;'>o</sup>
Question 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
Question 44:
In the fiqure where PQRTU is a circle, ISTI = IRSI and angle TSR = 52o. Find the angle marked m
- A 128<sup style='font-size: smaller;'>o</sup>
- B 52<sup style='font-size: smaller;'>o</sup>
- C 104<sup style='font-size: smaller;'>o</sup>
- D 64<sup style='font-size: smaller;'>o</sup>
- E 116<sup style='font-size: smaller;'>o</sup>
Question 45:
If K is a constant, which of the following equations best describes the parabola?
- A Y = kx<sup style='font-size: smaller;'>2</sup>
- B X = y<sup style='font-size: smaller;'>2</sup> - k
- C Y = k - x<sup style='font-size: smaller;'>2</sup>
- D X<sup style='font-size: smaller;'>2</sup> = y<sup style='font-size: smaller;'>2</sup> - k
- E Y = (k - x)<sup style='font-size: smaller;'>2</sup>