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Correct expression of \begin{aligned}
6.\overline{46}
\end{aligned} is

  • \begin{aligned} \frac{640}{99} \end{aligned}
  • \begin{aligned} \frac{640}{90} \end{aligned}
  • \begin{aligned} \frac{64000}{99} \end{aligned}
  • \begin{aligned} \frac{640}{9} \end{aligned}

Answer: Option A

Explanation:

\begin{aligned}
6.\overline{46} = 6 + 0.\overline{46}
= 6 + \frac{46}{99}
= 6\frac{46}{99} = \frac{640}{99}
\end{aligned}

Similar Questions :

1. \begin{aligned}
\frac{5 \times 1.6 - 2 \times 1.4}{1.3} = ?
\end{aligned}

  • 1
  • 2
  • 3
  • 4
  • 5

Answer: Option D

Explanation:

As per given equation we can solve like this :

\begin{aligned}
= \frac{8 - 2.8}{1.3} \\
= \frac{5.2}{1.3} = \frac{52}{13} \\
= 4
\end{aligned}

2. 0.7683 + 0.369 + 0.05 + 0.8 = ?

  • 1.9873
  • 0.9873
  • 1.8873
  • 1.9872

Answer: Option A

3. What will be the value of
\begin{aligned}
25.732^2 - 15.732^2
\end{aligned}

  • 214.64
  • 314.64
  • 414.64
  • 412.64

Answer: Option C

Explanation:

Can be easily solved with following formula
\begin{aligned}
a^2 - b^2 = (a - b)(a + b)
\end{aligned}

4. 15.06 * 0.0001 = ?

  • 15060000
  • 0.001506
  • 0.01506
  • 0.1506

Answer: Option B

Explanation:

Clearly after decimal 6 digits should be there.

5. What decimal of an hour is a second

  • .0028
  • .0027
  • .0026
  • .0025

Answer: Option B

Explanation:

1/(60*60) = 1/3600 = .0027

Read more from - Decimal Fraction Questions Answers