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Mathematics 1981 JAMB Past Questions

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21

Solve \(\frac{1}{x + 1}\) - \(\frac{1}{x + 3}\) = \(\frac{1}{4}\)

  • A. x = -1 or 3
  • B. x = 1 or 3
  • C. x = 1 or -5
  • D. x = -1 or 5
  • E. x = -1 or -3
View Answer & Discuss (4) JAMB 1981
22

In \(\bigtriangleup\)XYZ, XY = 3cm, XZ = 5cm and YZ = 7cm. If the bisector of XYZ meets XZ at W, what is the length of XW?

  • A. 1.5cm
  • B. 2.5cm
  • C. 3cm
  • D. 4cm
  • E. None of the above
View Answer & Discuss (4) JAMB 1981
23

If \(\log_{2} y = 3 - \log_{2} x^{\frac{3}{2}}\), find y when x = 4.

  • A. 8
  • B. \(\sqrt{65}\)
  • C. 4\(\sqrt{2}\)
  • D. 3
  • E. 1
View Answer & Discuss (4) JAMB 1981
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24

Given that 10\(^x\) = 0.2 and log\(_{10}\)2 = 0.3010, find x

  • A. -1.3010
  • B. -0.6990
  • C. 0.6990
  • D. 1.3010
  • E. 0.02
View Answer & Discuss (4) JAMB 1981
25

Two cars X and Y start at the same point and travel towards a point P which is 150km away. If the average speed of Y is 60km per hour and x arrives at P 25 minutes earlier than Y. What is the average speed of X?

  • A. 51\(\frac{3}{7}\)km per hour
  • B. 72km per hour
  • C. 37\(\frac{1}{2}\) km per hour
  • D. 66km per hour
  • E. 75km per hour
View Answer & Discuss (5) JAMB 1981
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