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.
The solution to the simultaneous equations 3x + 5y = 4, 4x + 3y = 5 is
(\(\frac{-13}{11}, \frac{1}{11}\))
(\(\frac{13}{11}, \frac{1}{11}\))
(\(\frac{13}{11}, \frac{-1}{11}\))
(\(\frac{11}{13}, \frac{1}{11}\))
(13, 11)
Correct answer is B
3x + 5y = 4, 4x + 3y = 5
3x + 5y = 4 x 4
4x + 3y = 5 x 3
12x + 20y = 16.....(i)
12x + 9y = 15.......(ii)
subtract eqn.(ii) from eqn.(i)
11y = 1
y = \(\frac{1}{11}\)
12x + 20 x \(\frac{1}{11}\) = 16
12x = \(\frac{156}{11}\)
x = \(\frac{13}{11}\)
= \(\frac{13}{11}, \frac{1}{11}\)
N220.00
N222.00
N201.40
N202.00
N180.80
Correct answer is B
3 kg of garri at N13.00 per kg = N39.00
half a cow = N160.00
24 oranges at 10k each = N2.40
balance = N20.60
Adding all together = N222.00
The solution to the quadratic equation 5 + 3x - 2x2 = 0 is
(\(\frac{5}{2}\), 1)
(5, 3)
-(\(\frac{5}{2}\), -1)
(\(\frac{5}{2}\), -1)
Correct answer is D
5 + 3x - 2x2 = 0, (x + 1)(5 - 2x) (expand to check)
(x + 1)(5 - 2x) = 0
when x = 1 = 0, x = -1
when 5 - 2x = 0, x = \(\frac{5}{2}\) - 1
Simplify \(\frac{3}{2x - 1}\) + \(\frac{2 - x}{x - 2}\)
\(\frac{2 - x}{(2x - 1)(x - 2)}\)
\(\frac{5 - x}{(2x - 1)(x - 2)}\)
\(\frac{4 - 2x}{2x - 1}\)
\(\frac{6 - 3x}{(2x - 1)(x - 2)}\)
Correct answer is C
\(\frac{3}{2x - 1}\) + \(\frac{2 - x}{x - 2}\)
= \(\frac{3}{2x - 1}\) - \(\frac{x - 2}{x - 2}\)
= \(\frac{3}{2x - 1}\) - 1
= \(\frac{3 - (2x - 1)}{2x - 1}\)
= \(\frac{3 - 2x + 1}{2x - 1}\)
= \(\frac{4 - 2x}{2x - 1}\)
In a regular polygon of n sides, each interior angle is 144°. Find n
12
11
10
8
6F
Correct answer is C
Formula for an interior angle of a polygon is (2n - 4) x 90
(2n - 4) x 90 = 144n
190n - 360 = 144n
n = \(\frac{360}{36}\)
= 10