Mathematics Past Questions And Answers
approximate 0.0033780 to 3 significant figures
- A. 338
- B. 0.338
- C. 0.00338
- D. 0.003
A body of mass 10kg moving with a velocity of 5\(ms^{-1}\) collides with another body of mass 15kg moving in the same direction as the first with a velocity of 2\(ms^{-1}\). After collision, the two bodies move together with a common velocity v\(ms^{-1}\).
- A. 3.2
- B. 5.3
- C. 7.0
- D. 8.0
The binary operation * is defined on the set of integers p and q by p*q = pq + p + q. Find 2 * (3 * 4).
- A. 59
- B. 19
- C. 67
- D. 38
Make r subject of the formula given that \(\frac{x}{r+a}=\frac{a}{r}\)
- A. \(\frac{a^{2}}{(x-a)}\)
- B. \(\frac{a^{2}}{(x+a)}\)
- C. \(\frac{a}{x-a}\)
- D. \(\frac{a}{x+a}\)
A box contains 5 blue balls, 3 black balls and 2 red balls of the same size. A ball is selected at random from the box and then replaced. A second ball is then selected. Find the probability of obtaining
(a) two red balls ;
(b) two blue balls or two black balls ;
(c) one black and one red ball in any order.
View Discussion (0)WAEC 1995 THEORYIf a binary operation * is defined by x * y = x + 2y, find 2 * (3 * 4)
- A. 24
- B. 16
- C. 14
- D. 26
Write as a single fraction \(\frac{1}{1 - x} + \frac{2}{1 + x}\)
- A. \(\frac{x + 3}{1 - x^2}\)
- B. \(\frac{3 - x}{(1 - x)^2}\)
- C. \(\frac{3 - x}{1 + x^2}\)
- D. \(\frac{3 - x}{1 - x^2}\)
If x km/h = y m/s, then y =
- A. \(\frac{7}{18}\)x
- B. \(\frac{11}{20}\)x
- C. \(\frac{4}{15}\)x
- D. \(\frac{5}{18}\)x
Find the distance between the points (1/2, 1/2) and (-1/2, -1/2).
- A. 1
- B. 0
- C. √3
- D. √2
Calculate the mean deviation of the first five prime numbers.
- A. 2.72
- B. 5.6
- C. 5.25
- D. 13.6