Mathematics Past Questions And Answers
A box contains 12 identical balls of which 5 are red, 4 blue, and the rest are green. If a ball is selected at random from the box, what is the probability that it is green?
- A. \(\frac{3}{4}\)
- B. \(\frac{1}{2}\)
- C. \(\frac{1}{3}\)
- D. \(\frac{1}{4}\)
A student found the approximate value of 0.02548 correct to two places of decimal instead of two significant figures. Find the percentage error.
- A. 0%
- B. 131/3%
- C. 15 5/13%
- D. 20%
Evaluate (1/2 - 1/4 - 1/8 - 1/16 + ...) - 1
- A. 2/3
- B. zero
- C. -2/3
- D. -1
If \(y = x(x^4 + x + 1)\), evaluate \(\int \limits_{0} ^{1} y \mathrm d x\).
- A. \(\frac{11}{12}\)
- B. 1
- C. \(\frac{5}{6}\)
- D. zero
p = \(\begin{vmatrix} x & 3 & 0 \\ 2 & y & 3\\ 4 & 2 & 4 \end{vmatrix}\)
Q = \(\begin{vmatrix} x & 2 & z \\ 3 & y & 2\\ 0 & 3 & z \end{vmatrix}\) Where pT is the transpose P calculate /pT/ when x = 0, y = 1 and z = 2
- A. 48
- B. 24
- C. -24
- D. -48
The velocity, V, of a particle after t seconds, is \(V = 3t^{2} + 2t - 1\). Find the acceleration of the particle after 2 seconds.
- A. 10\(ms^{-2}\)
- B. 12\(ms^{-2}\)
- C. 14\(ms^{-2}\)
- D. 17\(ms^{-2}\)
(a) Simplify : \(\frac{3\frac{1}{12} + \frac{7}{8}}{2\frac{1}{4} - \frac{1}{6}}\)
(b) If \(p = \frac{m}{2} - \frac{n^{2}}{5m}\) ;
(i) make n the subject of the relation ; (ii) find, correct to three significant figures, the value of n when p = 14 and m = -8.
View Discussion (0)WAEC 2007 THEORYThe diagram is a circle centre O. Find the value of x
- The diagram is a circle centre O. Find the value of x A. 30°
- B. 50°
- C. 61°
- D. 65.5°
What is the size of angle x in the diagram
- A. 15°
- B. 30°
- C. 45°
- D. 60°
A man buys recharge card for N500. He sells it for N430. What is the percentage loss?
- A. 7%
- B. 9%
- C. 14%
- D. 20%