Paper 1  Objectives  49 Questions
JAMB Exam
Year: 1980
Level: SHS
Time:
Type: Question Paper
Answers provided
No description provided
This paper is yet to be rated
DAAD scholarship to assist SubSaharan African students fleeing war in Ukraine to complete their studies
These are the best study techniques and methods that get higher grades in any school tests or exams.
Get free IT courses with certificates online for your skills upgrade in this era of Covid19.
#  Question  Ans 

1. 
Find, correct to three significant figures, the value of \(\sqrt{41830}\). A. 205 B. 647 C. 2050 D. 6470 E. 64.7
Show Content
Detailed Solution\(\sqrt{41830} = 204.5238\)\(\approxeq 205\) (to three significant figures) 

2. 
Write down the number 0.0052048 correct to three significant figures A. 0.005 B. 0.0052 C. 0.00520 D. 5.2048 E. 5204
Show Content
Detailed Solution0.0052048 = 0.00520 

3. 
Evaluate \((2^{0} + 4^{\frac{1}{2}})^{2}\) A. \(\frac{1}{4}\) B. \(\frac{5}{4}\) C. \(\frac{9}{4}\) D. 4 E. 9
Show Content
Detailed Solution\((2^{0} + 4^{\frac{1}{2}})^{2}\)= \((1 + (\frac{1}{4})^{\frac{1}{2}})^{2}\) = \((1 + \frac{1}{2})^{2}\) = \((\frac{3}{2})^{2} = \frac{9}{4}\) 

4. 
Which of the following is NOT a factor of 12\(^{4}\)  5\(^{4}\)? A. 7 B. 13 C. 17 D. 49 E. 169
Show Content
Detailed Solution124  54 = (122)2  (52)2= (122 + 52) x (122  52) (144 + 25)(144  25) = (169)(119) Factors of above 169, 17, 13, 7 

5. 
Rationalize the denominator of the given expression \(\frac{\sqrt{1 + a}  \sqrt{a}}{1 + a + \sqrt{a}}\) A. 1 + 2a  2\(\sqrt{a(1 + a)}\) B. \(\sqrt{1(1 + a)}\) C. 2a  2\(\sqrt{a(1 + a)}\) D. 1 + 2a  2\(\sqrt{a + b}\)
Show Content
Detailed Solution\(\frac{\sqrt{1 + a}  \sqrt{a}}{1 + a + \sqrt{a}}\) = \(\frac{\sqrt{1 + a}  \sqrt{a}}{\sqrt{1 + a} + \sqrt{a}}\) x \(\frac{\sqrt{1 + a}  \sqrt{a}}{\sqrt{1 + a}  \sqrt{a}}\)= \(\frac{\sqrt{1 + a + a}}{1 + a  a}\) = 2a + a(1 + a) = 1 + 2a  2\(\sqrt{a(1 + a)}\) 

6. 
When a dealer sells a bicycle for N81 he makes a profit of 80%. What did he pay for the bicycle? A. N73 B. N74.52 C. N75 D. N87.48 E. N75.52
Show Content
Detailed SolutionProfit = 8%\(\therefore S.P = N81 = (100 + 8)% = 108%\) \(108% = N81\) \(100% = \frac{81}{108} \times 100\) = \(\frac{8100}{108} = N75\) 

7. 
The median of the set of numbers 4, 9, 4, 13, 7, 14, 10, 17 is A. 13 B. 7 C. \(\frac{19}{2}\) D. \(\frac{39}{4}\) E. 10
Show Content
Detailed SolutionRearranging in increasing order 4, 4, 7, 9, 10, 13, 14, 17, themedian = \(\frac{(9 + 10)}{2}\) = \(\frac{19}{2}\) 

8. 
List all integer values of x satisfying the inequality 1 < 2x  5 \(\leq\) 5 A. <2, 3, 4, 5 B. 3, 4, 5 C. 2, 3, 4 D. 3, 4
Show Content
Detailed Solution\(1 < 2x  5 \leq 5\)\(\implies 1 + 5 < 2x  5 + 5 \leq 5 + 5\) \(4 < 2x \leq 10\) \(\implies 2 < x \leq 5 \) = 3, 4, 5. 

9. 
Find the roots of the equation 10x^{2}  13x  3 = 0 A. x = \(\frac{3}{5}\) or \(\frac{1}{2}\) B. x = \(\frac{3}{10}\) or 1 C. x = \(\frac{3}{10}\) or 1 D. x = \(\frac{1}{5}\) or \(\frac{3}{2}\) E. x = \(\frac{1}{5}\) or \(\frac{3}{2}\)
Show Content
Detailed Solution10x^{2}  13x  3 = 0 = 10x^{2}  15x + 2x  3 = 05x(2x  3) + 2x  3 = 0 = (5x + 1)(2x  3) = 0 5x + 1 = 0 or 2x  3 = 0 x = \(\frac{1}{5}\) or \(\frac{3}{2}\) 

10. 
A solid cylinder of radius 3cm has a total surface area of 36\(\pi\)cm2. Find its height A. 2cm B. 3cm C. 4cm D. 5cm E. 6cm
Show Content
Detailed SolutionArea 2\(\pi\)r2 + 2 \(\pi\)r(r + h)= 2\(\pi\)r(r + h) 36\(\pi\) = 6\(\pi\)(r + h) 36\(\pi\) = 6\(\pi\)(3 + h) 36\(\pi\) = 18\(\pi\) + 6\(\pi\)h 36\(\pi\)  18\(\pi\) = 6\(\pi\)h Divide both side by 6\(\pi\) h = 3cm 
Preview displays only 10 out of the 49 Questions