Past Questions And Answers
The table shows the marks scored by some candidates in an examination.
| Marks (%) | 0-9 | 10-19 | 20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80-89 | 90-99 |
| Frequency | 7 | 11 | 17 | 20 | 29 | 34 | 30 | 25 | 21 | 6 |
(a) Construct a cumulative frequency table for the distribution and draw a cumulative frequency curve.
(b) Use the curve to estimate, correct to one decimal place, the :
(i) Lowest mark for distinction if 5% of the candidates passed with distinction ; (ii) probability of selecting a candidate who scored at most 45%.
View Discussion (0)WAEC 2015 THEORY.jpg)
The longest bone in the body is the
- A. humerous
- B. femur
- C. scapula
- D. tibia
Jesus washed the feet of His disciples because
- A. He was soon to be glorified
- B. He wanted to serve by example
- C. it was a sign of holiness
- D. they neede to be washed
The loss made by a non profit making organization is called
- A. deficit
- B. surplus
- C. discount
- D. shortage
(a) Explain briefly the following terms:
(i) phenotype
(ii) hybrid
(iii) dominant character.
(b) Two varieties of maize, one with yellow (Y) grains and the other with purple (y) grains were crossed and all their offspring had yellow grains. When the offspring were crossed with the parent variety with purple grains, half of the resulting offspring had yellow grains, while the other half had purple grains. Using labelled diagrams only;
(i) deduce the genotype of the grains of the first filial generation,
(ii) show the results of the cross between the first filial generation and the parent purple variety.
(c) Mention two ways in which the application of genetics is beneficial to agriculture.
View Discussion (0)WAEC 2004 THEORYA machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine
- A. 0.50
- B. 0.63
- C. 0.80
- D. 1.60
The computer that functions by taking discrete numbers and performing mathematical calculations is called?
- A. mainframe
- B. digital
- C. hybrid
- D. analogue
Which of the following are chemical changes? I. cooking of food II. digestion of food III. freezing of water IV. water is heated up
- A. I and II
- B. I, II, and III
- C. III and IV
- D. all of the above
'It is most hateful in the sight of Allah that you say that which you do not' (Q. 61:3). The main teaching of the verse above is honesty in
- A. Deeds
- B. Words
- C. Words and deeds
- D. Deeds and worship
(a) List two factors each that affect heat loss by:
(i) radiation;
(ii) convection.
(b) State two factors that determine the quantity of heat in a body.
(c) Explain the statement: The vecilic latent heat of vaporization of mercury is 2.72 x 10\(^5\) Jkg\(^{-1}\).
(d)A jug of heat capacity 250 Jkg\(^{-1}\) contains water at 28°C. An electric heater of resistance 35\(\Omega\) connected to a 220 V source is used to raise the temperature of the water until it boils at 100°C in 4 minutes. After. another 5 minutes, 300 g of water has evaporated. Assuming no heat is lost to the surroundings, calculate the:
(i) mass of water in the jug before heating;
(ii) specific latent heat of vaporization of steam. [Specific heat capacity of water = 4200 kg\(^{-1}\)K\(^{-1}\)]
View Discussion (0)WAEC 2018 THEORY