Elementary Mathematics Questions and answers

  1. Elementary Mathematics
    1. Quadratic Equations
    2. Simplification
    3. Area and perimeter
    4. Volume and surface area
    5. Geometry
    6. Trigonometry
    7. Polynomials
    8. Height and Distance
    9. Simple and Decimal fraction
    10. Indices and Surd
    11. Logarithms
    12. Trigonometric ratio
    13. Straight lines
    14. Triangle
    15. Circles
    16. Quadrilateral and parallelogram
    17. Loci and concurrency
    18. Statistics
    19. Rectangular and Cartesian products
    20. Rational expression
    21. Set theory
    22. Factorisation
    23. LCM and HCF
    24. Clocks
    25. Real Analysis
21). If \( \Large 47.2506=4A+7B+2C+\frac{5}{D}+6E \), then the value of \( \Large 5A+3B+6C+D+3E \) is
A). 53.6003
B). 53.603
C). 153.6003
D). 213.0003
22). If \( \Large x*y = x^{2}+y^{2}-xy \), then the value of \( \Large 9*11 \) is
A). 93
B). 103
C). 113
D). 121
23). If \( \Large 5^{5x+5}=1 \), then x equals
A). 0
B). -1
C). 1
D). \( \Large -\frac{4}{5} \)
24). If \( \Large 3^{x+3}+7=250 \), then x is equal to
A). 5
B). 3
C). 2
D). 1
25). If \( \Large \frac{1}{4} \times \frac{2}{6} \times \frac{3}{8} \times \frac{4}{10} \times \frac{5}{12} \times ..... \times \frac{31}{64}=\frac{1}{2^{x}} \), the value of x is
A). 31
B). 32
C). 36
D). 37


26). If \( \Large x=\frac{\sqrt{3}+1}{\sqrt{3}-1}\ and\ y=\frac{\sqrt{3}-1}{\sqrt{3}+1} \), the value of \( \Large x^{2}+y^{2} \) is:
A). 14
B). 13
C). 15
D). 10
27). If \( \Large x=3+\sqrt[2]{2} \), then the value of \( \Large \left(\sqrt{x}-\frac{1}{\sqrt{x}}\right) \) is:
A). 1
B). 2
C). \( \Large 2\sqrt{2} \)
D). \( \Large 3\sqrt{3} \)
28). If p=999, then the value of \( \Large \sqrt[3]{p \left(p^{2}+3p+3\right)+1 } \) is
A). 1000
B). 999
C). 998
D). 1002
29). If \( \Large \frac{a}{b}=\frac{7}{9},\frac{b}{c}=\frac{3}{5} \), then the value of a:b:c
A). 7:9:15
B). 7:9:5
C). 21:35:45
D). 7:3:15
30). If x:y=7:3, then the value of \( \Large \frac{xy+y^{2}}{x^{2}-y^{2}} \) is
A). \( \Large \frac{3}{4} \)
B). \( \Large \frac{4}{3} \)
C). \( \Large \frac{3}{7} \)
D). \( \Large \frac{7}{3} \)
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