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Mathematics 2012 WAEC Past Questions

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31
Factorise completely: 32x2y - 48x3y3
  • A. 16x2y(2 - 3xy2)
  • B. 8xy(4x - 6x2y2)
  • C. 8x2y(4 - 6xy2)
  • D. 16xy(2x - 3x2y2)
View Answer & Discuss WAEC 2012
32
If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?
  • A. y = kx
  • B. y = \(\frac{k}{x}\)
  • C. y = k\(\sqrt{x}\)
  • D. y = x + k
View Answer & Discuss (2) WAEC 2012
33
If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?
  • A. y = kx
  • B. y = \(\frac{k}{x}\)
  • C. y = k\(\sqrt{x}\)
  • D. y = x + k
View Answer & Discuss WAEC 2012
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34
In the diagram, |QR| = 10m, |SR| = 8m

< QPS = 30o, < QRP = 90o and |PS| = x, Find x
  • A. 1.32m
  • B. 6.32m
  • C. 9.32m
  • D. 17.32
View Answer & Discuss (1) WAEC 2012
35
In the diagram, O is a circle centre of the circle PQRS and < PSR = 86o. If < PQR = xo, find x
  • A. 108o
  • B. 172o
  • C. 130o
  • D. 50o
View Answer & Discuss WAEC 2012
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