How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.
(3x + 2)(1 - x)
(3x + 2)(2x + 1)
3\((x + 2)^2\)
3(x + 1)(1 - x)
Correct answer is D
\((x + 2)^2\) - \((2x + 1)^2\)
= \((x^2 + 4x + 4) - (4x^2 + 4x + 1)\)
= \(x^2 \) + 4x + 4 - 4 \(x^2 \) - 4x - 1
= -3 \(x^2 \) + 3
= 3 - 3 \(x^2 \)
= 3(1 - \(x^2 \))
= 3(1 + x)(1 - x)
Solved the equation \(2x^2 - x - 6\) = 0
x = \(\frac{-3}{2}\) or 2
x = -2 or \(\frac{3}{2}\)
x = -3 or 2
x = 3 or -2
Correct answer is A
\(2x^2 - x - 6\) = 0
\(2x^2 - 4x + 3x - 6\) = 0
2x(x - 2) + 3(x - 2) = 0
(2x + 3) (x - 2) = 0
Either; 2x + 3 = 0 or x - 2 = 0
x = \(\frac{-3}{2}\) or x = 2
Find the value of x for which \(\frac{x - 5}{x(x - 1)}\) is defined
0 or 5
-5 or 5
-11 or 5
0 or 1
Correct answer is A
The expression \(\frac{x - 5}{x(x - 1)}\) is defined whten
x(x - 5) = 0.38
either x = 0 or x - 5 = 0
Hence, x = 0 or x = 5
The total surface area of a hemispher is 75\(\pi cm^2\). Find the radius.
5.0 cm
7.0 cm
8.5 cm
12.0 cm
Correct answer is A
Total surface area of hemisphere is
3\(\pi r^2\) = 75\(\pi cm^2\)
\(r^2\) = \(\frac{75 \pi}{3 \pi}\)
\(r^2\) = 25
r = \(\sqrt{25}\)
r = 5cm
\(\frac{3}{25}\)
\(\frac{1}{5}\)
\(\frac{6}{25}\)
\(\frac{2}{5}\)
Correct answer is D
No. of teams that scored at most 3 goals = 3 + 1 + 6 = 10
Hence, probability that a team selected at random scored at most 3 goals
= \(\frac{10}{25}\) = \(\frac{2}{5}\)