Mathematics Past Questions

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Past Questions

4,407 questions
Question 1 of 20 4,407 total questions
Question 1901
jamb 1989
If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is
A(2.6, 2.6)
B(2.5, 2.6)
C(2.6, 2.5)
D(2.5, 2.1)
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Question 1902
jamb 1989

In a family of 21 people, the average age is 14years. If the age of the grandfather is not counted, the average age drops to 12 years. What is the age of the grandfather?

A35 years
B40 years
C42 years
D54 years
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Question 1903
jamb 1989

In preparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represents meat in pie chart

A30o
B60o
C112.5o
D157.5o
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Question 1904
jamb 1989

OXYZW is a pyramid with a square base such that OX = OY= OZ = OW = 5cm and XY = XW = YZ = WZ = 6cm. Find the height OT

A2\(\sqrt{5}\)
B3
C4
D4\(\sqrt{3}\)
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Question 1905
jamb 1989

A cylindrical metal pipe 1m long has an outer diameter of 7.2cm and an inner diameter of 2.8cm. Find the volume of metal used for the cylinder

A440\(\pi\)cm3
B1100\(\pi\)cm3
C4400\(\pi\)cm3
D11,000\(\pi\)cm3
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Question 1906
jamb 1989

A square tile has side 30cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?

A336
B420
C576
D720
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Question 1907
jamb 1989
4sin2 x - 3 = 0, find x if 0 \(\geq\) x \(\geq\) 90o
A30o
B45o
C60o
D9o
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Question 1908
jamb 1989
The pilot of an aeroplane, flying 10km above the ground in the direction of a landmark, views the landmark to have angles of depression of 35o and 55o. Find the distance between the two points of observation
A10(sin 35o - sin 55o)
B10 cos35o - cos 55o
C10(tan35o - tan55o)
D10(cot35o - cot55o)
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Question 1909
jamb 1989

if x : y = 5 : 12 and z = 52cm, find the perimeter of the triangle.

A68cm
B84cm
C100cm
D120cm
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Question 1910
jamb 1989

In XYZ, y = z = 30° and XZ = 3cm. Find YZ

A\(\frac{\sqrt{3}}{2}\) cm
B3\(\frac{\sqrt{3}}{2}\) cm
C3\(\sqrt{3}\) cm
D2\(\sqrt{3}\) cm
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Question 1911
jamb 1989

PQRS is a rhombus. If PR\(^2\) + QS\(^2\) = kPQ\(^2\), determine k.

A1
B2
C3
D4
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Question 1912
jamb 1989

A regular polygon of (2k + 1) sides has 140° as the size of each interior angle. Find k

A4
B4\(\frac{1}{2}\)
C8
D8\(\frac{1}{2}\)
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Question 1913
jamb 1989
If -8, m, n, 19 are in arithmetic progression, find (m, n)
A1, 10
B2, 10
C3, 13
D4, 16
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Question 1914
jamb 1989
The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is
A\(\frac{x}{y}\)
B\(\frac{y}{x}\)
C(\(\frac{x}{y}\))\(\frac{1}{n - 2}\)
D(\(\frac{y}{x}\))\(\frac{1}{n - 2}\)
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Question 1915
jamb 1989

Simplify \(\frac{x(x + 1)^{-\frac{1}{2}} - (x + 1)^{\frac{1}{2}}}{(x + 1)^{\frac{1}{2}}}\)

A\(\frac{-1}{x + 1}\)
B\(\frac{1}{x + 1}\)
C\(\frac{1}{x}\)
D\(\frac{1}{x - 1}\)
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Question 1916
jamb 1989

Express \(\frac{1}{x + 1}\) - \(\frac{1}{x - 2}\) as a single algebraic fraction

A\(\frac{-3}{(x + 1)(2 - x)}\)
B\(\frac{3}{(x + 1)(2 - x)}\)
C\(\frac{-1}{(x + 1)}\)
D\(\frac{1}{(x + 1)(x - 2)}\)
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Question 1917
jamb 1989
find the range of values of values of r which satisfies the following inequality, where a, b and c are positive \(\frac{r}{a}\) + \(\frac{r}{b}\) + \(\frac{r}{c}\) > 1
Ar > \(\frac{abc}{bc + ac + ab}\)
Br < abc
Cr > \(\frac{1}{a}\) + \(\frac{1}{b}\) + \(\frac{1}{c}\)
D. \(\frac{1}{abc}\)
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Question 1918
jamb 1989
What value of Q will make the expression 4x2 + 5x + Q a complete square?
A\(\frac{25}{16}\)
B\(\frac{25}{64}\)
C\(\frac{5}{8}\)
D\(\frac{5}{4}\)
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Question 1919
jamb 1989

Solve the pair of equation for x and y respectively \(2x^{-1} - 3y^{-1} = 4; 4x^{-1} + y^{-1} = 1\)

A-1, 2
B1, 2
C2, 1
D2, -1
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Question 1920
jamb 1989
What are K and L respectively if \(\frac{1}{2}\)(3y - 4x)2 = (8x2 + kxy + Ly2)
A-12, \(\frac{9}{2}\)
B-6, 9
C6, 9
D12, \(\frac{9}{2}\)
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