Tag: real number

Questions Related to real number

Multiple choice maths real number first forms rational numbers as recurring/terminating decimals decimal expansions of real numbers

Express the following as a recurring decimal.

$\displaystyle \frac{2}{7}$.

  1. $0.\overline{28}$
  2. $0.\overline{285714}$
  3. $0.\overline{2857}$
  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$\displaystyle \frac { 2 }{ 7 }  = 0.285714285.. = 0.\overset { \ _ \ _ \ _ \ _ \ _ \ _ \ _ \ _ \ _  }{ 285714 } $

In this division, $285714$ is a recurring decimal.

Multiple choice maths real number first forms rational numbers as recurring/terminating decimals decimal expansions of real numbers

Express  the following in a recurring decimal form.

$\displaystyle \frac{3}{11}$.

  1. $0.\overline{3}$
  2. $0.\overline{29}$
  3. $0.\overline{4}$
  4. $0.\overline{27}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The value of $\displaystyle \frac { 3 }{ 11 }$ is $ 0.272727272727.. 0.\overset { \ _ \ _ \ _ \ _  }{ 27 } $

In this division $27$ is a recurring decimal.

Multiple choice maths real number first forms rational numbers as recurring/terminating decimals decimal expansions of real numbers

Find, whether each of the followings is a terminating or a non-terminating decimal.

$7 \div 11$.

  1. Terminating

  2. Non-terminating

  3. Ambiguous

  4. Data insufficient

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While expressing a fraction in the decimal form, when we perform division we get some remainder. 

If the division process does not end i.e. we do not get the remainder equal to zero; then such decimal is known as non-terminating decimal.
Here, $7$ divided by $11$ gives $0.636363636363.... $.
Therefore, this is a case of non terminating decimal.

Multiple choice maths real number first forms rational numbers as recurring/terminating decimals decimal expansions of real numbers

The non terminating non-recurring decimal cannot be represented as

  1. irrational numbers

  2. rational numbers

  3. real numbers

  4. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Write the decimal number as a fraction $0.2020020002...... $
It is Non- terminating decimal and cannot be represented as a quotient of two integers.
Therefore, B is the correct answer.