Decimal Fraction Questions Answers

• 22. 1/0.04 is equal to

  1. 25.5
  2. 2.5
  3. 25
  4. .25

  Answer And Explanation

  Answer: Option C

  Explanation:

  1/0.04 = (1 * 100)/4 = 100/4 = 25

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• 23. If 144/0.144 = 14.4/x, then x = ?

  1. 0.144
  2. 0.0144
  3. .00144
  4. 1.44

  Answer And Explanation

  Answer: Option B

  Explanation:

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

  1. $$\begin{aligned} \frac{640}{99} \end{aligned}$$
  2. $$\begin{aligned} \frac{640}{90} \end{aligned}$$
  3. $$\begin{aligned} \frac{64000}{99} \end{aligned}$$
  4. $$\begin{aligned} \frac{640}{9} \end{aligned}$$

  Answer And Explanation

  Answer: Option A

  Explanation:

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

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• 25. Value of
  $$\begin{aligned} 0.5\overline{6} \end{aligned}$$

  1. $$\begin{aligned} \frac{51}{99} \end{aligned}$$
  2. $$\begin{aligned} \frac{51}{90} \end{aligned}$$
  3. $$\begin{aligned} \frac{51}{9} \end{aligned}$$
  4. $$\begin{aligned} \frac{510}{99} \end{aligned}$$

  Answer And Explanation

  Answer: Option B

  Explanation:

  $$\begin{aligned} 0.5\overline{6} = \frac {56 - 5}{90} = \frac {51}{90} \end{aligned}$$

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• 26. $$\begin{aligned} (0.34\overline{67} + 0.13\overline{33}) = ? \end{aligned}$$

  1. $$\begin{aligned} 0.048\overline{01} \end{aligned}$$
  2. $$\begin{aligned} 4.8\overline{01} \end{aligned}$$
  3. $$\begin{aligned} 48.\overline{01} \end{aligned}$$
  4. $$\begin{aligned} 0.48\overline{01} \end{aligned}$$

  Answer And Explanation

  Answer: Option D

  Explanation:

  $$\begin{aligned} (0.34\overline{67} + 0.13\overline{33})\end{aligned}$$
  $$\begin{aligned} = \frac{3467-34}{9900} + \frac{1333-13}{9900} \end{aligned}$$
  $$\begin{aligned} = \frac{3433 + 1320}{9900} = \frac{4753}{9900} \end{aligned}$$
  $$\begin{aligned} = \frac{4801 - 48}{9900} = 0.48\overline{01} \end{aligned}$$

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• 27. 0.7683 + 0.369 + 0.05 + 0.8 = ?

  1. 1.9873
  2. 0.9873
  3. 1.8873
  4. 1.9872

  Answer And Explanation

  Answer: Option A

  Explanation:

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• 28. Evaluate
  $$\begin{aligned} \frac{2.39^2 - 1.61^2}{2.39 - 1.61} \end{aligned}$$

  1. 2
  2. 3
  3. 4
  4. 5

  Answer And Explanation

  Answer: Option C

  Explanation:

  Use following formula to solve it quickly
  

  $$\begin{aligned} \frac{a^2-b^2}{a-b}=\frac{(a+b)(a-b)}{(a-b)} = (a+b) \end{aligned}$$
  = (2.39+1.61) = 4

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