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 range of the data: k+2, k-3, k+4, k-2, k, k-5, k+3, k-1, and k+6 is
10
11
6
8
Correct answer is B
Range = Highest value - Lowest value
= (k + 6) - (k - 5)
= 11
Find the mean of the data: 7, -3, 4, -2, 5, -9, 4, 8, -6, 12
3
4
1
2
Correct answer is D
\(Mean: \frac{7 + (-3) + 4 + (-2) + 5 + (-9) + 4 + 8 + (-6) + 12}{10} = \frac{20}{10}\)
= 2
The locus of a point P which is equidistant from two given points S and T is
the perpendicular bisector of ST
the angle bisector of PS and ST
a perpendicular to ST
a line parallel to ST
Correct answer is A
No explanation has been provided for this answer.
Find the value of a if the line 2y - ax + 4 = 0 is perpendicular to the line y + (x/4) - 7 = 0
-4
4
8
-8
Correct answer is C
2y - ax + 4 = 0 ⟹⟹ 2y = ax - 4.
y + (x/4) - 7 = 0 ⟹⟹ y = -x/4 + 7
Slope of line 1 = a/2
Slope of line 2 = -1/4
-1/4 x a/2 = -1 (product of the slope of two perpendicular lines = -1)
a/8 = 1 ⟹⟹ a = 8.
A solid hemisphere has a radius of 7 cm. Find the total surface area.
400 cm2
462 cm2
66 cm2
308 cm2
Correct answer is B
Total surface area of hemisphere = half of TSA of sphere + circumference of circle
= \(2\pi r^{2} + \pi r^{2} = 3\pi r^{2}\)
= \( 3 \times \frac{22}{7} \times 7^{2} = 462cm^{2}\)