Mathematics Past Questions And Answers
If log102 = x, express log1012.5 in terms of x
- A. 2(1 + x)
- B. 2 + 3x
- C. 2(1 - x)
- D. 2 - 3x
If U = (1, 2, 3, 6, 7, 8, 9, 10) is the universal set. E = (10, 4, 6, 8, 10) and F = {x: 1x2 = 2\(^{6}, x is odd}. Find (E ∩ F)', where ' means the complement of a set.
- A. (0)
- B. U
- C. (8)
- D. ϕ
Find (X-Y) if 4x - 3y = 7 and 3x - 2y = 5
- A. 4
- B. 3
- C. 2
- D. -2
What is the next number in the series 2, 1, \(\frac{1}{2}\), \(\frac{1}{4}\)...
- A. \(\frac{1}{3}\)
- B. \(\frac{2}{8}\)
- C. \(\frac{3}{7}\)
- D. \(\frac{1}{8}\)
The mean of the ages of ten secondary school pupils is 16 but when the age of their teacher is added to it the men becomes 19. Find the age of the teacher
- A. 27
- B. 35
- C. 38
- D. 49
At 10% discount, an item valued at 45,000 naira now cost
- A. 4,050
- B. 40,500
- C. 40,505
- D. 40,550
(a) Given that \(\begin{vmatrix} 5 & 2 & -3 \\ -1 & k & 6 \\ 3 & 9 & (k + 2) \end{vmatrix} = -207\), find the values of the constant k.
(b) The equation of a curve is \(x(y^{2} + 1) - y(x^{2} + 1) + 4 = 0\). Find the:
(i) gradient of the curve at any point (x, y).
(ii) equation of the tangent to the curve at the point (-1, -3).
View Discussion (0)WAEC 2007 THEORYIf N varies directly as M and N = 8 when M = 20 find M when N = 7
- A. 13
- B. 15
- C. \(17\frac{1}{2}\)
- D. \(18\frac{1}{2}\)
Factorize 2y2 - 15xy + 18x2
- A. (2y - 3x) (y + 6x)
- B. (2y - 3x) (y - 6x)
- C. (2y + 3x) (y - 6x)
- D. (3y + 2x) (y - 6x)
Three forces \(-63j , 32.14i + 38.3j\) and \(14i - 24.25j\) act on a body of mass 5kg. Find, correct to one decimal place, the :
(a) magnitude of the resultant force ;
(b) acceleration of the body.
View Discussion (0)WAEC 2012 THEORY
