>> Aptitude >> Number System

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Contents:

- Aptitude
- Approximation
- Average
- Boat and Stream
- Compound interest
- Discount
- Linear Equations
- Mensuration
- Mixture and Allegation
- Number series
- Number System
- Partnership
- Percentage
- Permutation and combination
- Pipes and Cisterns
- Probability
- Problem on ages
- Profit and Loss
- Ratio and Proportions
- Simple and compound interest
- Time and Distance
- Time and work
- Trains
- Unitary Method
- Word problems
- Work and Wages

1). If a and b are two whole numbers, then a-b = c will be a whole number if
Correct Answer: both (b) and (c)
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2). Multiplicative identity of whole number 'a' is
Correct Answer: 1
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3). If number 'b' is a factor of a number 'a', then 'a' divided by 'b' gives the remainder
Correct Answer: zero
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4). Value of \( (-1)^{-13} \)is
Correct Answer: -1
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5). If 'a' and 'b' are two rational numbers, then number of rational number between them are
Correct Answer: infinite
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6). Predecessor of lowest positive integer is
Correct Answer: zero
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7). If 'a' and 'b' are two rational numbers, then \( \left( \frac{a}{b}\right)^{-n} \) is equal to
Correct Answer: \( \Large \frac{1}{\left( \frac{a}{b} \right)^n}\)
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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
(201+201+.......300) - (101+102+.....200) = 100 + 100 + ......+100 = 100 * 100 = 10000 | ||||

9). If \( \Large k \neq 0 \) and \( \Large k \neq 1 \), then which of the following cannot be true?
Any positive or negative number \( \Large \neq \) 0 will never have its square as zero or negative | ||||

10). Which of the following is equal to \( \Large 3^4.3^3 \)?
We know , \( \Large a^x.a^y = a^{x+y} \) |