Mathematics Past Questions

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Past Questions

4,407 questions
Question 1 of 20 4,407 total questions
Question 2111
jamb 1981

What is the size of an exterior angle of a regular pentagon?

A36o
B60o
C72o
D120o
E360o
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Question 2112
jamb 1981

The difference between 4\(\frac{5}{7}\) and 2\(\frac{1}{4}\) is greater than sum of \(\frac{1}{14}\) and 1\(\frac{1}{2}\) by

A\(\frac{23}{28}\)
B\(\frac{24}{28}\)
C\(\frac{50}{56}\)
D\(\frac{27}{28}\)
E\(\frac{48}{56}\)
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Question 2113
jamb 1981

A baking recipe calls for 2.5kg of sugar and 4.5kg of flour. With this recipe some cakes were baked using 24.5kg of a mixture of sugar and flour. How much sugar was used?

A12.25kg
B6.75kg
C8.75kg
D15.75kg
E8.25kg
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Question 2114
jamb 1981
Multiply x2 + x + 1 by x2 - x + 1
Ax4 - x + x2
Bx4 - x2 + x2
Cx4 + x2 + 1
Dx4 + x2
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Question 2115
jamb 1981

If b = a + cp and r = ab + \(\frac{1}{2}\)cp2, express b\(^2\) in terms of a, c, r.

Ab2 = aV + 2cr
Bb2 = ar + 2c2r
Cb2 = a2 = \(\frac{1}{2}\) cr2
Db2 = \(\frac{1}{2}\)ar2 + c
Eb2 = 2cr - a2
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Question 2116
jamb 1981
Simplify T = \(\frac{4R_2}{R_1^{-1} + R_2^{-1} + 4R_3^{-1}}\)
A\(\frac{4R_1 \times R_2 R_3}{R_2R_3 + R_1R_3 + 4R_1 R_2}\)
B\(\frac{R_1 R_2 R_3}{R_2R_3 + R_1R_2 + 4R_1 R_2}\)
C\(\frac{16R_1 R_2 R_3}{R_2R_3 + R_1R_2 + R_1 R_2}\)
D\(\frac{4R_1 R_2 R_3}{4R_2R_3 + R_1R_2 + 4R_1 R_2}\)
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Question 2117
jamb 1981
The first term of an Arithmetic progression is 3 and the fifth term is 9. Find the number of terms in the progression if the sum is 81
A12
B27
C9
D4
E36
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Question 2118
jamb 1981

Show that \(\frac{\sin 2x}{1 + \cos x}\) + \(\frac{sin2 x}{1 - cos x}\) is

Asin x
Bcos2x
C2
D3
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Question 2119
jamb 1981
The area of a circular plate is one-sixteenth the surface area of a ball of a ball, If the area of the plate is given as P cm2, then the radius of the ball is
A\(\frac{2P}{\pi}\)
B\(\frac{P}{\sqrt{\pi}}\)
C\(\frac{P}{\sqrt{2\pi}}\)
D2\(\frac{P}{\pi}\)
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Question 2120
jamb 1981

The difference between the length and width of a rectangle is 6cm and the area is 135cm2. What is the length?

A25cm
B18cm
C15cm
D24cm
E27cm
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Question 2121
jamb 1981

The positive root of t in the following equation, 4t2 + 7t - 1 = 0, correct to 4 places of decimal, is

A1.0622
B10.6225
C0.1328
D0.3218
E2.0132
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Question 2122
jamb 1981

Evaluate \(\frac{6.3 \times 10^5}{8.1 \times 10^3}\) to 3 significant fiqures

A77.80
B778.0
C7.870
D8.770
E88.70
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Question 2123
jamb 1981

The number 25 when converted from the tens and units base to the binary base (base two) is one of the following

A10011
B111011
C111000
D11001
E110011
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Question 2124
jamb 1981
simplify \(\frac{6^{2n + 1} \times 9^n \times 4^{2n}}{18^n \times 2^n \times 12^{2n}}\)
A32n
B3 x 23n - 1
C2n
D6
E1
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Question 2125
jamb 1981

Two cars X and Y start at the same point and travel towards a point P which is 150km away. If the average speed of Y is 60km per hour and x arrives at P 25 minutes earlier than Y. What is the average speed of X?

A51\(\frac{3}{7}\)km per hour
B72km per hour
C37\(\frac{1}{2}\) km per hour
D66km per hour
E75km per hour
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Question 2126
jamb 1981

Given that 10\(^x\) = 0.2 and log\(_{10}\)2 = 0.3010, find x

A-1.3010
B-0.6990
C0.6990
D1.3010
E0.02
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Question 2127
jamb 1981

If \(\log_{2} y = 3 - \log_{2} x^{\frac{3}{2}}\), find y when x = 4.

A8
B\(\sqrt{65}\)
C4\(\sqrt{2}\)
D3
E1
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Question 2128
jamb 1981

In \(\bigtriangleup\)XYZ, XY = 3cm, XZ = 5cm and YZ = 7cm. If the bisector of XYZ meets XZ at W, what is the length of XW?

A1.5cm
B2.5cm
C3cm
D4cm
ENone of the above
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Question 2129
jamb 1981

Solve \(\frac{1}{x + 1}\) - \(\frac{1}{x + 3}\) = \(\frac{1}{4}\)

Ax = -1 or 3
Bx = 1 or 3
Cx = 1 or -5
Dx = -1 or 5
Ex = -1 or -3
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Question 2130
jamb 1981

Simplify \(\frac{\sqrt{2}}{\sqrt{3} - \sqrt{2}}\) - \(\frac{\sqrt{3} - \sqrt{2}}{\sqrt{3} + \sqrt{2}}\)

A2\(\sqrt{2} - \sqrt{3}\)
B3(\(\sqrt{6}\) - 1)
C\(\sqrt{6}\) - 3
D-\(\frac{1}{2}\)
E\(\frac{-\sqrt{3}}{\sqrt{2} - \sqrt{2}}\)
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