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.
Subtract (-y + 3x + 5z) from (4y - x - 2z)
5y - 4x - 7z
3y + 2x + 3z
-5y + 4x + 7z
2x - 5y + 3z
Correct answer is A
(4y - x - 2z) - (-y + 3x + 5z)
= 4y + y - x - 3x - 2z - 5z
= 5y - 4x - 7z
y = -1
y = 1
y = 3
y = -3
Correct answer is D
Let the straight line PQ = y
2x\(^2\) - 5x - 1 - y = 2x\(^2\) - 5x + 2
y = 2x\(^2\) - 5x - 1 - 2x\(^2\) + 5x - 2
y = -3
which of the following is not quadratic expression?
\(y = 2x^2 - 5x\)
\(y=x(x-5)\)
\(y = x^2 - 5\)
y = 5(x-1)
Correct answer is D
A quadratic equation is an equation of the second order. The highest power in the equation is 2.
If \(2x^2 + kx - 14 = (x+2)(2x-7)\), find the value of K
-3
5
9
11
Correct answer is A
\(2x^2 + kx - 14 = (x+2)(2x-7)\\
∴2x^2 + kx - 14 = 2x^2 - 3x - 14\)
equating coefficient K = -3
if \(\frac{4m+3n}{4m-3n}=\frac{5}{2}\), find the ratio m:n
7:4
4:3
3:4
4:7
Correct answer is A
\(\frac{4m + 3n}{4m - 3n} = \frac{5}{2}\)
\(5(4m - 3n) = 2(4m + 3n)\)
\(20m - 15n = 8m + 6n\)
\(20m - 8m = 6n + 15n\)
\(12m = 21n\)
\(\frac{21}{12} = \frac{m}{n}\)
\(m : n = 7 : 4\)