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Biology
UTME / JAMB 2012
Variety of Organisms & Classification of Living Things
Diagram
Use the diagram above to answer this question.
The graph illustrates
Attached Figure / Diagram
A
the highest frequency for height of 2 metres
B
a discontinuously varying character
C
a continuously varying character
D
total yield in a cassava farm
medium Difficulty
Verified Correct Answer: Option C
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #31174)
Biology
UTME / JAMB 2012
Variety of Organisms & Classification of Living Things
Diagram
The largest number of cassava plants has an approximate height of
Attached Figure / Diagram
A
1.4m
B
1.6m
C
1.8m
D
2.0m
medium Difficulty
Verified Correct Answer: Option B
Biological Concept & Syllabus Guide
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #37247)
Biology
UTME / JAMB 2012
Nutrition in Plants & Animals (Photosynthesis & Food Substances)
Diagram
Solution
The type of interaction shown is referred to as
Attached Figure / Diagram
A
interspecific competition
B
intraspecific competition
C
mutualism
D
cooperation
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
The interaction between P. aurelia and P. caudatum is interspecific competition, specifically demonstrating competitive exclusion. In this scenario, P. aurelia outcompetes P. caudatum for resources, leading to a decline in the P. caudatum population while the P. aurelia population continues to grow. This is because P. aurelia is more efficient at obtaining food, demonstrating that two species cannot occupy the same ecological niche indefinitely.
Source: Myschool Past Questions Archive (Record #37248)
Biology
UTME / JAMB 2012
Adaptation & Evolution
Diagram
Solution
In the diagram, which of the following statement is true of the interaction
Attached Figure / Diagram
A
P aurelia is better adapted for obtaining food than P caudatum
B
P caudatum is better adapted for obtaining food than P. aurelia
C
both organisms cannot coexist
D
both organisms cannot reproduce
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
From the diagram,we can infer that P aurelia is better adapted for obtaining food than P caudatum because as number of days increases the number of P aurelia increases in number as well while P caudatum decreases with increase in the number of days. This implies that P aurelia tend to adapt more despite the competition because instead of decreasing in number, they were increasing in number progressively.
Source: Myschool Past Questions Archive (Record #37249)
Biology
UTME / JAMB 2012
Adaptation & Evolution
Solution
In the diagram, which of the following statement is true of the interaction
A
P aurelia is better adapted for obtaining food than P caudatum
B
P caudatum is better adapted for obtaining food than P. aurelia
C
both organisms cannot coexist
D
both organisms cannot reproduce
medium Difficulty
Verified Correct Answer: Option A
Biological Concept & Syllabus Guide
From the diagram,we can infer that P aurelia is better adapted for obtaining food than P caudatum because as number of days increases the number of P aurelia increases in number as well while P caudatum decreases with increase in the number of days. This implies that P aurelia tend to adapt more despite the competition because instead of decreasing in number, they were increasing in number progressively.
Source: Official Exam / Past Question Archive
Mathematics
UTME / JAMB 2011
Inequalities & Linear Programming
Solution
Solve the inequality x2 + 2x > 15.
A
x 5
B
-5 < x < 3
C
x 5
D
x > 3 or x < -5
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
x2 + 2x > 15
x2 + 2x - 15 > 0
(x2 + 5x) - (3x - 15) > 0
x(x + 5) - 3(x + 5) >0
(x - 3)(x + 5) > 0
therefore, x = 3 or -5
i.e. x< 3 or x > -5
Source: WAEC / JAMB / NECO Classroom Archive (Record #29387)
Chemistry
UTME / JAMB 2011
Acids, Bases, pH & Salts
Solution
Which of the following is a deliquescent compound?
A
NaNO3
B
CaCl2
C
CuO
D
Na2CO3.10H2O
medium Difficulty
Verified Correct Answer: Option B
Chemical Principles & Mechanism
Deliquescent substances are referred to known as those substances which absorbs moisture from the surrounding and dissolves themselves with the moisture or water to form a solution.
Examples are sodium hydroxide(NaOH), calcium chloride(CaCl2), potassium hydroxide(KOH), ammonium chloride(NH4Cl) , etc
Source: WAEC / JAMB / NECO Classroom Archive (Record #4779)
Mathematics
UTME / JAMB 2011
Plane Geometry, Polygons & Circle Theorems
Solution
If 2q35 = 778, find q
A
2
B
1
C
4
D
O
medium Difficulty
Verified Correct Answer: Option A
Step-by-Step Mathematical Solution
2q35 = 778
2 x 52 + q x 51 + 3 x 50 = 7 x 81 + 7 x 80
2 x 25 + q x 5 + 3 x 1 = 7 x 8 + 7 x 1
50 + 5q + 3 = 56 + 7
5q = 63 - 53
q = \(\frac{10}{5}\)
q = 2
Source: Myschool Past Questions Archive (Record #27410)
Mathematics
UTME / JAMB 2011
Plane Geometry, Polygons & Circle Theorems
Solution
Simplify \(\frac{3\frac{2}{3} \times \frac{5}{6} \times \frac{2}{3}}{\frac{11}{15} \times \frac{3}{4} \times \frac{2}{27}}\)
A
\(5\frac{2}{3}\)
B
30
C
\(4\frac{1}{3}\)
D
50
medium Difficulty
Verified Correct Answer: Option D
Step-by-Step Mathematical Solution
\(\frac{3\frac{2}{3} \times \frac{5}{6} \times \frac{2}{3}}{\frac{11}{15} \times \frac{3}{4} \times \frac{2}{27}}\)
\(\frac{\frac{11}{3} \times \frac{5}{6} \times \frac{2}{3}}{\frac{11}{15} \times \frac{3}{4} \times \frac{2}{27}}\)
\(\frac{110}{54} \div \frac{66}{1620}\)
50
Source: Myschool Past Questions Archive (Record #27413)
Mathematics
UTME / JAMB 2011
Fractions, Decimals, Percentages & Approximations
Solution
A man invested N5,000 for 9 months at 4%. What is the simple interest?
A
N150
B
N220
C
N130
D
N250
medium Difficulty
Verified Correct Answer: Option A
Step-by-Step Mathematical Solution
S.I. = \(\frac{P \times R \times T}{100}\)
If T = 9 months, it is equivalent to \(\frac{9}{12}\) years
S.I. = \(\frac{5000 \times 4 \times 9}{100 \times 12}\)
S.I. = N150
Source: Myschool Past Questions Archive (Record #27414)
Mathematics
UTME / JAMB 2011
Fractions, Decimals, Percentages & Approximations
Solution
If the numbers M, N, Q are in the ratio 5:4:3, find the value of \(\frac{2N - Q}{M}\)
A
2
B
3
C
1
D
4
medium Difficulty
Verified Correct Answer: Option C
Step-by-Step Mathematical Solution
M:N:Q == 5:4:3
i.e M = 5, N = 4, Q = 3
Substituting values into equation, we have...
\(\frac{2N - Q}{M}\)
= \(\frac{2(4) - 3}{5}\)
= \(\frac{8 - 3}{5}\)
= \(\frac{5}{5}\)
= 1
Source: Myschool Past Questions Archive (Record #27416)
Mathematics
UTME / JAMB 2011
Indices, Logarithms & Surds
Solution
Simplify \((\frac{16}{81})^{\frac{1}{4}} \div (\frac{9}{16})^{-\frac{1}{2}}\)
A
\(\frac{2}{3}\)
B
\(\frac{1}{2}\)
C
\(\frac{8}{9}\)
D
\(\frac{1}{3}\)
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
\((\frac{16}{81})^{\frac{1}{4}} \div (\frac{9}{16})^{-\frac{1}{2}}\)
\((\frac{16}{81})^{\frac{1}{4}} \div (\frac{16}{9})^{\frac{1}{2}}\)
\((\frac{2^4}{3^4})^{\frac{1}{4}} \div (\frac{4^2}{3^2})^{\frac{1}{2}}\)
\(\frac{2^{4 \times \frac{1}{4}}}{3^{4 \times \frac{1}{4}}} \div \frac{4^{2 \times \frac{1}{2}}}{3^{2 \times \frac{1}{2}}}\)
\(\frac{2}{3} \div \frac{4}{3}\)
\(\frac{2}{3} \times \frac{3}{4}\)
\(\frac{2}{4}\)
\(\frac{1}{2}\)
Source: Myschool Past Questions Archive (Record #27418)
Mathematics
UTME / JAMB 2011
Indices, Logarithms & Surds
Solution
If log318 + log33 - log3x = 3, Find x.
A
1
B
2
C
o
D
3
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
log\(_{3}^{18}\) + log\(_{3}^{3}\) - log\(_{3}^{x}\) = 3
log\(_{3}^{18}\) + log\(_{3}^{3}\) - log\(_{3}^{x}\) = 3log33
log\(_{3}^{18}\) + log\(_{3}^{3}\) - log\(_{3}^{x}\) = log333
log3(\(\frac{18 \times 3}{X}\)) = log333
\(\frac{18 \times 3}{X}\) = 33
18 x 3 = 27 x X
x = \(\frac{18 \times 3}{27}\)
= 2
Source: Myschool Past Questions Archive (Record #29335)
Mathematics
UTME / JAMB 2011
Indices, Logarithms & Surds
Solution
Rationalize \(\frac{2 - \sqrt5}{3 - \sqrt5}\)
A
\(\frac{1 - \sqrt5}{2}\)
B
\(\frac{1 - \sqrt5}{4}\)
C
\(\frac{ \sqrt5 - 1}{2}\)
D
\(\frac{1 + \sqrt5}{4}\)
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
\(\frac{2 - \sqrt5}{3 - \sqrt5}\) x \(\frac{3 + \sqrt5}{3 + \sqrt5}\)
\(\frac{(2 - \sqrt5)(3 + \sqrt5)}{(3 - \sqrt5)(3 + \sqrt5)}\) = \(\frac{6 +2\sqrt5 - 3\sqrt5 - \sqrt25}{9 + 3\sqrt5 - 3\sqrt5 - \sqrt25}\)
= \(\frac{6 - \sqrt5 - 5}{9 - 5}\)
= \(\frac{1 - \sqrt5}{4}\)
Source: Myschool Past Questions Archive (Record #29353)
Mathematics
UTME / JAMB 2011
Plane Geometry, Polygons & Circle Theorems
Solution
Simplify (\(\sqrt2 + \frac{1}{\sqrt3})(\sqrt2 - \frac{1}{\sqrt3}\))
A
\(\frac{7}{3}\)
B
\(\frac{5}{3}\)
C
\(\frac{5}{2}\)
D
\(\frac{3}{2}\)
medium Difficulty
Verified Correct Answer: Option B
Step-by-Step Mathematical Solution
(\(\sqrt2 + \frac{1}{\sqrt3})(\sqrt2 - \frac{1}{\sqrt3}\))
\(\sqrt4 - \frac {\sqrt2}{\sqrt3} + \frac {\sqrt2}{\sqrt3} - \frac {1}{\sqrt9}\)
= 2 - \(\frac {1}{3}\)
= \(\frac {16 - 1}{3}\)
= \(\frac{5}{3}\)
Source: Myschool Past Questions Archive (Record #29358)