Mathematics Past Questions And Answers
Find the quadratic equation whose roots are \(\frac{1}{2}\) and -\(\frac{1}{3}\)
- A. 3x\(^2\) + x + 1 = 0
- B. 6x\(^2\) + x - 1 = 0
- C. 3x\(^2\) + x - 1 = 0
- D. 6x\(^2\) - x - 1 = 0
Factorize r2 - r(2p + q) + 2pq
- A. (r - 2q)(2r - p)
- B. (r - p)(r + p0
- C. (r - q)(r - 2p)
- D. (2r - q)(r + p)
Given that x = \(\begin{pmatrix} -4 \\ 3 \end{pmatrix}\) and y= \(\begin{pmatrix} -9 \\ 15 \end{pmatrix}\) calculate, correct to the nearest degree, the angle between the vectors
View Discussion (0)WAEC 2021 THEORYA sector of circle of radius 7.2cm which substends an angle of 300o at the centre is used to form a cone. What s the radius of the base of the cone?
- A. 8cm
- B. 9cm
- C. 6cm
- D. 7cm
if P and Q are fixed points and X is a point which moves so that XP = XQ, the locus of X is
- A. A straight line
- B. a circle
- C. the bisector of angle PXQ
- D. the perpendicular bisector of PQ
If \(\frac{x}{a + 1}\) + \(\frac{y}{b}\) = 1. Make y the subject of the relation.
- A. \(\frac{b(a + 1 - x)}{a + 1}\)
- B. \(\frac{a + 1}{b(a - x + 1)}\)
- C. \(\frac{a(b - x + 1)}{b + 1}\)
- D. \(\frac{b}{a(b - x + 1)}\)
The average of x,x+5,x+6,x?7, and x?9 is 3. Find the sum of the largest and smallest numbers for this set of numbers.
- A. ?5
- B. 7
- C. 20
- D. 5
A man will be (x+10)years old in 8years time. If 2years ago he was 63 years., find the value of x
- A. 55
- B. 63
- C. 57
- D. 67
OGIVE is constructed using
- A. Third quartile range
- B. Semi-quartile range
- C. Cummulative frequency table
- D. Inter-quartile table
If y = (2x + 2)\(^3\), find \(\frac{\delta y}{\delta x}\)
- A. 3(2x +2)2
- B. 6(2x +2)
- C. 3(2x +2)
- D. 6(2x +2)2