2015 - JAMB Mathematics Past Questions and Answers - page 5
41
The extension of a stretched string is directly proportional to its tension. If the extension produced by a tension of 8 Newton’s is 2cm, find the extension produced by a tension of 12 newton’s.
A
2
B
1
C
\( 0\)
D
3
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42
Factorize \( x^2 − 2x − 15 \)
A
(x + 3)2
B
(x + 5)(x − 3)
C
(x − 5)2
D
(x − 5)(x + 3)
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43
If A = (−3,5) and B = (4,−1) find the co-ordinate of the mid point
A
2, ½
B
½ , 2
C
1, ½
D
0, 2
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44
Find the simple interest on N325 in 5years at 3% per annum.
A
N48.75K
B
N50.10K
C
N75.50K
D
N15.75K
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45
Simplify (0.09)2 and give your answer correct to 4 significant figures
A
0.81
B
0.081
C
0.0081
D
8.0001
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46
Simplify \( [1 ÷ (x^2 + 3x + 2)] + [1 ÷ (x^2 + 5x + 6)] \)
A
\( \frac{2}{(x + 1)^2} \)
B
\( \frac{2}{(x + 1)(x + 2} \)
C
\( \frac{2}{(x + 1)(x + 2} \)
D
\( \frac{2}{(x + 1)(x + 3} \)
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47
One bag contain 3 blue and 5 red balls, another bag contain 2 blue and 4 red balls respectively. One ball is drawn for each bag. What is the probability both balls are blue
A
\( \frac{2}{15} \)
B
\( \frac{3}{24} \)
C
\( \frac{3}{21} \)
D
\( \frac{3}{28} \)
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48
Given that A = {3, 4, 1, 10, ⅓ }
B = {4, 3 ⅓, ⅓, 7}.
Find A∩B
B = {4, 3 ⅓, ⅓, 7}.
Find A∩B
A
{}
B
{⅓, 1, 2}
C
{3, 4, ⅓}
D
{1, 3, ⅓}
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49
Find x if 132x = 70 eight.
A
5
B
3
C
6
D
1
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50
A man sells his new brand car for N420,000 at a gain of 15%. What did it cost him?
A
N410,000
B
N365, 217
C
N157, 250
D
N257,000
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