Mathematics 2017 Past Questions | WAEC

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

21.  Given that cos 30\(^o\) = sin 60\(^o\) = \(\frac{3}{2}\) and sin 30\(^o\) = cos 60\(^o\) = \(\frac{1}{2}\), evaluate \(\frac{tan 60^o – q}{1 – tan 30^o}\)

  • A. \(\sqrt{3 – 2}\)
  • B. 2 – \(\sqrt{3}\)
  • C. \(\sqrt{3}\)
  • D. -2

22. The average age of a group of 25 girls is 10year. If one girl, aged 12 years and 4 months joins the group, find the new average age of the group

  • A. 10.1 years
  • B. 9.3 years
  • C. 8.7 years
  • D. 8 . 3 years

23. In what number base was the addition 1 + nn = 100, where n > 0, done?

  • A. n – 1
  • A. n + 2
  • B. n + 1
  • C. n

24. Simplify; \(\sqrt{2}(\sqrt{6} + 2\sqrt{2}) – 2\sqrt{3}\)

  • A. 4
  • B. \(\sqrt{3} + 4\)
  • C. 4 \(\sqrt{2}\)
  • D. 4\(\sqrt{3} + 4\)

25. Three exterior angles of a polygon are 30º, 40º and 60º. If the remaining exterior angles are 46º each, name the polygon.

  • A. decagon
  • B. nonagon
  • C. octagon
  • D. hexagon

26.  Simplify the expression \(\frac{a^2 b^4 – b^2 a^4}{ab(a + b)}\)

  • A. \(a^2 – b^2\)
  • B. \(b^2 – a^2\)
  • C. \(a^2b – ab^2\)
  • D. \(ab^2 – a^2b\)

27.  Find the 6th term of the sequence \(\frac{2}{3} \frac{7}{15} \frac{4}{15}\),…

  • A.-\(\frac{1}{3}\)
  • B.-\(\frac{1}{5}\)
  • C. -\(\frac{1}{15}\)
  • D. \(\frac{1}{9}\)

28.  The roots of a quadratic equation are \(\frac{-1}{2}\) and \(\frac{2}{3}\). Find the equation.

  • A. \(6x^2 – x + 2 = 0\)
  • B. \(6x^2 – x – 2 = 0\)
  • C. \(6x^2 + x – 2 = 0\)
  • D. \(6x^2 + x + 2 = 0\)

29.   Make x the subject of the relation d = \(\sqrt{\frac{6}{x} – \frac{y}{2}}\)

  • A. x = \(\frac{6 + 12}{d^2 + y}\)
  • B. x = \(\frac{12}{d^2 – y}\)
  • C. x = \(\frac{12}{y} – 2d^2\)
  • D. x = \(\frac{12}{2d^2 – y}\)

30. Consider the statements: p it is hot, q: it is raining

Which of the following symbols correctly represents the statement “It is raining if and only if it it is cold”?

  • A. p  q
  • B. p  q
  • C.  q
  • D. q  p
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