Number System Questions and answers

  1. Aptitude
    1. Compound interest
    2. Boat and Stream
    3. Trains
    4. Percentage
    5. Discount
    6. Mixture and Allegation
    7. Unitary Method
    8. Work and Wages
    9. Pipes and Cisterns
    10. Linear Equations
    11. Approximation
    12. Word problems
    13. Number System
    14. Time and Distance
    15. Average
    16. Ratio and Proportions
    17. Profit and Loss
    18. Partnership
    19. Permutation and combination
    20. Probability
    21. Problem on ages
    22. Time and work
    23. Simple and compound interest
    24. Mensuration
    25. Number series
1). If a and b are two whole numbers, then a-b = c will be a whole number if
A). a < b
B). a > b
C). a = b
D). both (b) and (c)
2). Multiplicative identity of whole number 'a' is
A). 1
B). 1/a
C). a+1
D). a-1
3). If number 'b' is a factor of a number 'a', then 'a' divided by 'b' gives the remainder
A). any number greater than zero
B). any number less than zero
C). zero
D). one
4). Value of \( (-1)^{-13} \)is
A). 1
B). -1
C). \( \left( \frac{1}{13}\right) \)
D). -13
5). If 'a' and 'b' are two rational numbers, then number of rational number between them are
A). one
B). two
C). zero
D). infinite


6). Predecessor of lowest positive integer is
A). zero
B). -1
C). 1
D). none of these
7). If 'a' and 'b' are two rational numbers, then \( \left( \frac{a}{b}\right)^{-n} \) is equal to
A). \( -n \left( \frac{a}{b} \right) \)
B). \(-\left(\frac{a}{b} \right)\)
C). \( \Large \frac{1}{\left( \frac{b}{a} \right)^n} \)
D). \( \Large \frac{1}{\left( \frac{a}{b} \right)^n}\)
8). If sum of integers from 101 to 200, inclusive is subtracted from the sum of integers from 201 to 300 inclusive, then the result is
A). 0
B). 100
C). 1000
D). 10000
9). If \( \Large k \neq 0 \) and \( \Large  k \neq 1 \), then which of the following cannot be true?
A). \(k^2 > k \)
B). \(k^2 < k \)
C). \(k^2 = k \)
D). Both b and c
10). Which of the following is equal to \(  \Large 3^4.3^3 \)?
A). \( \Large 3^{7} \)
B). \( \Large 3^{12} \)
C). \( \Large 6^{7} \)
D). \( \Large 9^{12} \)
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Total Pages : 36