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Mathematics 1998 WAEC Past Questions

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56
Three of the angles of a hexagon are each Xo. The others are each 3Xo. Find X
  • A. 30o
  • B. 40o
  • C. 60o
  • D. 80o
  • E. 120o
View Answer & Discuss (8) WAEC 1998
57
Evaluate \(\sqrt{20}\times (\sqrt{5})^3\)
  • A. 10
  • B. 20
  • C. 25
  • D. 50
View Answer & Discuss WAEC 1998
58
If P = {3, 7, 11, 13} and Q = {2, 4, 8, 16}, which of the following is correct
  • A. \((P\cap Q)^l={2, 3, 4, 13}\)
  • B. \(n(P\cup Q)=4\)
  • C. \(P\cup Q = \emptyset\)
  • D. \(P\cap Q = \emptyset\)
View Answer & Discuss (1) WAEC 1998
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59

It is observed that \(1 + 3 = 2^2, 1 + 3 + 5 = 3^2, 1 + 3 + 5 + 7 = 4^2\).

If 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 = P\(^2\) find P

  • A. 6
  • B. 7
  • C. 8
  • D. 9
View Answer & Discuss (8) WAEC 1998
60

Evaluate \(3.0\times 10^1 - 2.8\times 10^{-1}\)leaving the answer in standard form

  • A. \(2\times 10^{-1}\)
  • B. \(2\times 10^{2}\)
  • C. \(2.972 \times 10^{1}\)
  • D. \(2.972 \times 10^{2}\)
View Answer & Discuss (4) WAEC 1998
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