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Mathematics 1989 JAMB Past Questions

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26
The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is
  • A. \(\frac{x}{y}\)
  • B. \(\frac{y}{x}\)
  • C. (\(\frac{x}{y}\))\(\frac{1}{n - 2}\)
  • D. (\(\frac{y}{x}\))\(\frac{1}{n - 2}\)
View Answer & Discuss JAMB 1989
27
If -8, m, n, 19 are in arithmetic progression, find (m, n)
  • A. 1, 10
  • B. 2, 10
  • C. 3, 13
  • D. 4, 16
View Answer & Discuss (1) JAMB 1989
28

A regular polygon of (2k + 1) sides has 140° as the size of each interior angle. Find k

  • A. 4
  • B. 4\(\frac{1}{2}\)
  • C. 8
  • D. 8\(\frac{1}{2}\)
View Answer & Discuss JAMB 1989
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29

PQRS is a rhombus. If PR\(^2\) + QS\(^2\) = kPQ\(^2\), determine k.

  • A. 1
  • B. 2
  • C. 3
  • D. 4
View Answer & Discuss (1) JAMB 1989
30

In XYZ, y = z = 30° and XZ = 3cm. Find YZ

  • A. \(\frac{\sqrt{3}}{2}\) cm
  • B. 3\(\frac{\sqrt{3}}{2}\) cm
  • C. 3\(\sqrt{3}\) cm
  • D. 2\(\sqrt{3}\) cm
View Answer & Discuss JAMB 1989
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