Mathematics Past Questions And Answers
(a) Mr Sarfo borrowed $25,000 from Afiak financial services at 21% simple interest per annum for 3 years if he was able to pay back the loan in two years at equal yearly installments how much did he pay each year?
(b) Two consecutive numbers are such that the sum of thrice the smaller and twice the larger is 17.
find correct through three significant figures the smaller number as a percentage of the sum of the two numbers
View Discussion (0)WAEC 2021 THEORYThe nth term of a sequence is n2 - 6n - 4. Find the sum of the 3rd and 4th terms.
- A. 24
- B. 23
- C. -24
- D. -25
(a) Copy and complete the table of the relation \(y = 2\sin x - \cos 2x\).
| x | 0° | 30° | 60° | 90° | 120° | 150° | 180° |
| y | 0.5 | -1.0 |
Using a scale of 2 cm to 30° on the x- axis and 2 cm to 0.5 unit on the y- axis, draw the graph of \(y = 2\sin x - \cos 2x\), for \(0° \leq x \leq 180°\).
(b) Using the same axes, draw the graph of \(y = 1.25\).
(c) Use your graphs to find the : (i) values of x for which \(2\sin x - \cos 2x = 0\) ; (ii) the roots of the equation \(2\sin x - \cos 2x = 1.25\).
View Discussion (0)WAEC 2006 THEORY.jpg)
Find the volume of a solid cylinder with base radius 10cm and height 14cm.
- A. 220cm3
- B. 880cm3
- C. 1400cm3
- D. 4400cm3
Find the mean deviation of assets of numbers: 14, 15, 16, 17, 18, and 19.
- A. 2.5
- B. 1.7
- C. 1.5
- D. 3.5
The radius and height of a solid cylinder is 8 cm and 14 cm respectively. Find, correct totwo d.p the total surface area.
(Take \(\pi = \frac{22}{7})\)
- A. \(1,106.29cm^2\)
- B. \(1,016.29cm^2\)
- C. \(1,106.89cm^2\)
- D. \(1,206.27cm^2\)
A point X is on the bearing 342° from a point Y. What is the bearing of Y from X?
- A. 342°
- B. 252°
- C. 198°
- D. 162°
The equation of a circle is given as 2x\(^2\) + 2y\(^2\) - x - 3y - 41 = 0. Find the coordinates of its centre.
- A. (\(\frac{-1}{4}\), \(\frac{3}{4}\))
- B. (\(\frac{1}{4}\), \(\frac{3}{4}\))
- C. (\(\frac{-1}{2}\), \(\frac{3}{2}\))
- D. (\(\frac{-1}{2}\), \(\frac{-3}{2}\))
The volume of a cone of height 3cm is 38\(\frac{1}{2}\)cm3. Find the radius of its base. [Take \(\pi = \frac{22}{7}\)]
- A. 3.0cm
- B. 3.5cm
- C. 4.0cm
- D. 4.5cm
(a) A particle of mass 2 kg moves under the action of a constant force, F N , with an initial velocity \((3 i + 2 j ) ms^{ -1}\) and a velocity of \((15 i - 4 j ) ms^{ -1}\) after 4 seconds . Find the:
acceleration of the particle;
(b) A particle of mass 2 kg moves under the action of a constant force, F N , with an initial velocity \((3 i + 2 j ) ms^{ -1}\) and a velocity of \((15 i - 4 j ) ms^{ -1}\) after 4 seconds . Find the:
magnitude of the force F ;
(c) A particle of mass 2 kg moves under the action of a constant force, F N , with an initial velocity \((3 i + 2 j ) ms^{ -1}\) and a velocity of \((15 i - 4 j ) ms^{ -1}\) after 4 seconds . Find the:
magnitude of the velocity of the particle after 8 seconds , correct tothree decimal places.
View Discussion (0)WAEC 2023 THEORY