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The volume of a cuboid is 54cm3. If the length, width and height of the cuboid are in the ratio 2:1:1 respectively, find its total surface area
A108cm2
B90cm2
C80cm2
D72cm2
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Question 12
waec2012
Find the coefficient of m in the expression of (\(\frac{m}{2} - 1 \frac{1}{2}\)) (m + \(\frac{2}{3}\))
A-\(\frac{1}{6}\)
B- \(\frac{1}{2}\)
C-1
D-1\(\frac{1}{6}\)
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Question 13
waec2012
The sum of the interior angles of regular polygon is 1800o. How many sides has the polygon?
A16
B12
C10
D8
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Question 14
waec2012
Solve (\(\frac{27}{125}\))-\(\frac{1}{3}\) x (\(\frac{4}{9}\))\(\frac{1}{2}\)
A\(\frac{10}{9}\)
B\(\frac{9}{10}\)
C\(\frac{2}{5}\)
D\(\frac{12}{125}\)
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Question 15
waec2012
Alfred spent \(\frac{1}{4}\) of his money on food, \(\frac{1}{3}\) on clothing and save the rest. If he saved N72000.00, how much did he spend on food?
AN43,200.00
BN43,000.00
CN42,200.00
DN40,000.00
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Question 16
waec2012
If p = {prime factors of 210} and Q = {prime less than 10}, find p \(\cap\) Q
A{1,2, 3}
B{2, 3, 5}
C{1, 3, 5,7}
D{2,3,5,7}
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Question 17
waec2012
Express 3 - [\(\frac{x - y}{y}\)] as a single fraction
A\(\frac{3xy}{y}\)
B\(\frac{x - 4y}{y}\)
C\(\frac{4y - x}{y}\)
D3 - \(\frac{x - y}{y}\)
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Question 18
waec2012
If x + 0.4y = 3 and y = \(\frac{1}{2}\)x, find the value of (x + y)
A1\(\frac{1}{4}\)
B2\(\frac{1}{2}\)
C3\(\frac{3}{4}\)
D5
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Question 19
waec2012
Which of these statements about y = \(\sqrt{8m}\) is correct?
Alog y = log 8 x log \(\sqrt{m}\)
Blog y = 3 log 2 x \(\frac{1}{2}\) log m
Clog y = 3 log 2 - \(\frac{1}{2}\) log m
Dlog y = \(\frac{3}{2}\) log 2 + \(\frac{1}{2}\) log m
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Question 20
waec2012
A bag contains 4 red and 6 black balls of the same size. If the balls are shuffled briskly and two balls are drawn one after the other without replacement, find the probability of picking balls of different colours
A\(\frac{8}{15}\)
B\(\frac{13}{25}\)
C\(\frac{11}{15}\)
D\(\frac{13}{15}\)
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Question 21
waec2012
Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21, calculate the standard deviation of the scores
A\(\sqrt{10}\)
B4
C5
D\(\sqrt{30}\)
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Question 22
waec2012
A kite flies on a taut string of length 50m inclined at tan angle 54o to the horizontal ground. The height of the kite above the ground is
A50 tan 30o
B50 sin 54o
C50 tan 54o
D50 sin 36o
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Question 23
waec2012
If cos(x + 40)o = 0.0872, what is the value of x?
A85o
B75o
C65o
D45o
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Question 24
waec2012
In \(\bigtriangleup\) XYZ, /XY/ = 8cm, /YZ/ = 10cm and /XZ/ = 6cm. Which of these relation is true?
A/XY/ + /YZ/ = /XZ/
B/XY/ - /YZ/ = /XZ/
C/XY/2 = /Y/2 - /XY/2
D/YZ/2 = /XZ/2 + /XY/2
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Question 25
waec2012
The lengths of the minor and major arcs 54cm and 126cm respectively. Calculate the angle of the major sector
A360o
B252o
C246o
D234o
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Question 26
waec2012
The curved surface area of a cylindrical tin is 704cm2. If the radius of its base is 8cm, find the height. [Take \(\pi = \frac{22}{7}\)]`
A14cm
B9cm
C8cm
D7cm
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Question 27
waec2012
Solve the inequality: \(\frac{-m}{2} - \frac{5}{4} \geq \frac{5m}{12} - \frac{7}{6}\)
Am \(\leq \frac{5}{4}\)
Bm \(\geq \frac{5}{4}\)
Cm \(\leq - \frac{1}{11}\)
Dm \(\geq - \frac{1}{11}\)
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Question 28
waec2012
The sum of 12 and one third of n is 1 more than twice n. Express the statement in the form of an equation
A12n - 6 = 0
B3n - 12 = 0
C2n - 35 = 0
D5n - 33 = 0
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Question 29
waec2012
If x + y = 2y - x + 1 = 5, find the value of x
A3
B2
C1
D-1
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Question 30
waec2012
Make p the subject of the relation: q = \(\frac{3p}{r} + \frac{s}{2}\)
