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The subtraction below is in base seven. Find the missing number.
5 1 6 2seven
-2 6 4 4seven
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2 * 1 5
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A2
B3
C4
D5
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Question 12
waec2010
What is the value of x when y = 5?
y = \(\frac{1}{2}\) x + 1
A8
B9
C10
D11
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Question 13
waec2010
\(\begin{array}{c|c} x & 0 & 2 & 4 & 6\\ \hline y & 1 & 2 & 3 & 4\end{array}\).
The table is for the relation y = mx + c where m and c are constants. What is the equation of the line described in the tablet?
Ay = 2x
By = x + 1
Cy = x
Dy = \(\frac{1}{2}x + 1\)
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Question 14
waec2010
The mean age of R men in a club is 50 years, Two men aged 55 and 63, left the club and the mean age reduced by 1 year. Find the value of R
A18
B20
C22
D28
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Question 15
waec2010
Bola sold an article for N6,900.00 and made a profit of 15%. If he sold it for N6,600.00 he would make a
Aprofit of 13%
Bloss of 12%
CProfit of 10%
Dloss of 5%
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Question 16
waec2010
How many times, correct to the nearest whole number, will a man run round circular track of diameter 100m to cover a distance of 1000m?
A3
B4
C5
D6
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Question 17
waec2010
The nth term of the sequence -2, 4, -8, 16.... is given by
ATn = 2n
BTn = (-2)n
CTn = (-2n)
DTn = n
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Question 18
waec2010
If y = \(\frac{(2\sqrt{x^2 + m})}{3N}\), make x the subject of the formular
A\(\frac{\sqrt{9y^2 N^2 - 2m}}{3}\)
B\(\frac{\sqrt{9y^2 N^2 - 4m}}{2}\)
C\(\frac{\sqrt{9y^2 N^2 - 3m}}{2}\)
D\(\frac{\sqrt{9y^2 N - 3m}}{2}\)
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Question 19
waec2010
The sum of the exterior of an n-sided convex polygon is half the sum of its interior angle. find n
A6
B8
C9
D12
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Question 20
waec2010
Simplify \(\frac{2}{2 + x} + \frac{2}{2 - x}\)
A\(\frac{4}{4 - x^3}\)
B\(\frac{8}{4 - x^2}\)
C\(\frac{4x}{4 - x^2}\)
D\(\frac{8 - 4x}{4 - x^2}\)
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Question 21
waec2010
What is the length of a rectangular garden whose perimeter is 32cm and area 39cm2?
A25cm
B18cm
C13cm
D9cm
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Question 22
waec2010
Given that tan x = 1, where 0o \(\geq\) x 90o, evaluate \(\frac{1 - \sin^2 x}{\cos x}\)
A2\(\sqrt{2}\)
B\(\sqrt{2}\)
C\(\frac{\sqrt{2}}{2}\)
D\(\frac{1}{2}\)
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Question 23
waec2010
A rectangle has length xcm and width (x - 1)cm. If the perimeter is 16cm. Find the value of x
A3\(\frac{1}{2}\)cm
B4cm
C4\(\frac{1}{2}\)cm
D5cm
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Question 24
waec2010
If sin 3y = cos 2y and 0o \(\leq\) 90o, find the value of y
\(\begin{array}{c|c} \text{No. of pets} & 0 & 1 & 2 & 3 & 4 \\ \hline \text{No. of students} & 8 & 4 & 5 & 10 & 3\end{array}\) The table shows the number of pets kept by 30 students in a class. If a student is picked at random ftom the class. What is the probability that he/she kept more than one pet?
A\(\frac{1}{5}\)
B\(\frac{2}{5}\)
C\(\frac{3}{5}\)
D\(\frac{4}{5}\)
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Question 27
waec2010
Given that \(\frac{5^{n +3}}{25^{2n -3}}\) = 5º, find n
An = 1
Bn = 2
Cn = 3
Dn = 5
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Question 28
waec2010
An empty rectangular tank is 250cm long and 120cm wide. If 180 litres of water is poured into the tank. Calculate the height of the water
