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.
If m * n = n - (m+2) for any real number m and n find the value of 3*(-5)?
-6
-8
-10
-12
Correct answer is C
m * n = n - (m+2)
= -5 - (3+2)
= -5-5
= -10
10
9
10/9
9/10
Correct answer is A
\(a=1, r=\frac{9}{10}\\
S_n = \frac{a}{1-r}\\
S_n = \frac{1}{1-\frac{9}{10}}\\
=1\div \frac{1}{10}\\
=1\times \frac{10}{1}\\
10\)
The sum of the first n terms of the arithmetic progression 5, 11, 17, 23, 29, 35, ... is?
n(3n - 0.5)
n(3n + 2)
n(3n + 2.5)
n(3n + 5)
Correct answer is B
a = 5, d = 6, n = n
Sn = n/2(2a + (n-1)d)
= n/2(2(5) + (n-1)6)
= n/2(10 + 6n-6)
= n/2(6n+4)
= 6n2/2 + 4n/2
= 32 + 2n
= n(3n + 2)
Find the range of values of x for which 3x - 7 \(\leq\) 0 and x + 5 > 0?
-5 < x < \(\frac{7}{3}\)
-5 \(\leq\) x \(\leq\) \(\frac{7}{3}\)
-5 < x \(\leq\) \(\frac{7}{3}\)
5 \(\leq\) x < \(\frac{7}{3}\)
Correct answer is C
3x - 7 \(\leq\) 0 and x + 5 > 0
3x \(\leq\) 7 and x > -5
x \(\leq\) \(\frac{7}{3}\)
∴ Range -5 < x \(\leq\) \(\frac{7}{3}\)
Determine the value of x for which (x\(^2\) - 1) > 0?
x < -1 or x > 1
-1 < x < 1
x > 0
x < -1
Correct answer is B
No explanation has been provided for this answer.