Past Questions And Answers
A metal rod of length 50cm is heated from 40oC to 80oC. If the linear expansivity of the material is \(\alpha\), calculate the increase in length of the rod (in metres) in terms of \(\alpha\)
- A. 20\(\alpha\)
- B. 200\(\alpha\)
- C. 2000\(\alpha\)
- D. 20000\(\alpha\)
Machine Language instructions are expressed in?
- A. binary.
- B. decimal.
- C. hexadecimal.
- D. octal.
Find the median of the numbers 9,7, 5, 2, 12,9,9, 2, 10, 10, and 18.
- A. 7
- B. 9
- C. 10
- D. 11
The table shows the distribution of hours spent at work by the employees of a factory in a week.
| Time (in hours) | 20 - 29 | 30 - 39 | 40 - 49 | 50 - 59 | 60 - 69 | 70 - 79 |
| No of persons | 8 | 11 | 23 | 25 | 8 | 5 |
(a) Draw an ogive for the distribution.
(b) Using your graph, estimate the (i) lower quartile (ii) median (iii) 40th percentile (iv) number of employees that spent at least 50 hours 30 minutes at work.
View Discussion (0)WAEC 2006 THEORY
(a) State five factors that should be considered in choosing an irrigation system in West Africa.
(b) Mention four problems associated with irrigation in West Africa
(c) A rectangle-shaped farmland has a length of 0.4 km and a breadth of 2,400 m, calculate the area of the farmland in hectares
(d) List one primary and three secondary tillage implements
View Discussion (0)WAEC 2017 THEORYThe prophet who was ordained from the womb for God's service was
- A. Jeremiah
- B. Isaiah
- C. Ezekiel
- D. Hosea
The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;
| Organism | Number in the habitat | |
| habitat W | habitat Y | |
| Plankton | 126 | 0 |
| Antelope | 0 | 51 |
| Water flea | 10 | 0 |
| Tilapia | 23 | 0 |
| Lion | 0 | 6 |
| Frog | 6 | 0 |
| Grass | 0 | 250 |
What type of habitat is W?
- A. Rainforest
- B. Pond
- C. Desert
- D. Ocean
An evidence of a common ancestral for fishes, amphibians, reptiles, birds and mammals is the
- A. possession of wings by birds and bats
- B. cold-bloodedness of fishes, amphibians and reptile
- C. presence of gilll clefts in vertebrate embryos
- D. possession of scale by fish and reptiles
Factorize x2−2x−15
- A. (x + 3)2
- B. (x + 5)(x − 3)
- C. (x − 5)2
- D. (x − 5)(x + 3)
Which of the following roles is being played by the Organization of Petroleum Exporting Countries (OPEC) with regards to Nigeria’s crude oil?
- A. Exploiting
- B. Exploring
- C. Refining
- D. Marketing