Waec Mathematics Past Questions For Year 2017
Question 46
Three exterior angles of a polygon are 30\(^o\), 40\(^o\) and 60\(^o\). If the remaining exterior angles are 46\(^o\) each, name the polygon.
- A. decagon
- B. nonagon
- C. octagon
- D. hexagon
Question 47
Calculate the variance of 2, 3, 3, 4, 5, 5, 5, 7, 7 and 9
- A. 2.2
- B. 3.4
- C. 4.0
- D. 4.2
Question 48
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 = \(\frac{12}{2d^2 + y}\)
Question 49
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. \(ab^2 - a^2b\)
