Mathematics Past Questions And Answers
Simplify \(\frac{2}{a+b}-\frac{1}{a-b}\)
- A. \(\frac{3}{a+b}\)
- B. \(\frac{a-3b}{a^2-b^2}\)
- C. \(\frac{3a-b}{a^2
- D. \(\frac{a-3b}{a^2+b^2}\)
If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64
- A. 12
- B. 6
- C. 3
- D. 5
A chord subtends an angle of 72º at the centre of a circle of radius 24.5m. Calculate the perimeter of the minor segment. [Take π = \(\frac{22}{7}\)
View Discussion (0)WAEC 2022 THEORY
A function is defined by \(h : x \to 2 - \frac{1}{2x - 3}, x \neq \frac{3}{2}\). Find \(h^{-1}(\frac{1}{2})\).
- A. \(6\)
- B. \(\frac{11}{6}\)
- C. \(\frac{11}{4}\)
- D. \(\frac{5}{3}\)
Find \(\lim \limits_{x \to 3} \frac{x + 3}{x^{2} - x - 12}\)
- A. -1
- B. \(\frac{-1}{7}\)
- C. \(\frac{1}{7}\)
- D. 1
Given that G is directly proportional to the square of H. If G is 5 when H is 3, Find H when G is 100
- A. 150
- B. 125
- C. 180
- D. 225
Evaluate \(\frac{(05652 - 04375)^2}{0.04}\) correct to three significant figures
- A. 3.11
- B. 3.13
- C. 0.313
- D. 3.12
ZK9PXL428 rearranged as follows – letters first in alphabetical order, followed by the numbers in ascending numerical order, gives:
- A. KZ9LPX248
- B. 2489KLPXZ
- C. KLPXZ2489
- D. 248LPXKZ9
If \(V = \begin{pmatrix} -2 \\ 4 \end{pmatrix}\) and \(U = \begin{pmatrix} -1 \\ 5 \end{pmatrix}\), find \(|U + V|\).
- A. \(3\sqrt{10}\)
- B. \(\sqrt{82}\)
- C. 15
- D. \(2\sqrt{5}\)
Simplify 0.63954 ÷ 0.003 giving your answer correct to two significant figures
- A. 213.18
- B. 213.00
- C. 213
- D. 210