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Evaluate
\begin{aligned}
\frac{2.39^2 - 1.61^2}{2.39 - 1.61}
\end{aligned}

  • 2
  • 3
  • 4
  • 5

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

Similar Questions :

1. Find the value of X
3889 + 12.952 - X = 3854.002

  • 47.95
  • 44.95
  • 43.95
  • 40.95

Answer: Option A

2. Value of
\begin{aligned}
0.5\overline{6}
\end{aligned}

  • \begin{aligned} \frac{51}{99} \end{aligned}
  • \begin{aligned} \frac{51}{90} \end{aligned}
  • \begin{aligned} \frac{51}{9} \end{aligned}
  • \begin{aligned} \frac{510}{99} \end{aligned}

Answer: Option B

Explanation:

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

3. Evaluate 2.5 / .0005

  • 5000
  • 500
  • 50000
  • 50

Answer: Option A

Explanation:

2.5 * 10000 / 5 = 25000/5 = 5000

4. 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}

5. What will be the vulgar fraction of 0.75

  • 3/5
  • 3/4
  • 3/2
  • 3/7

Answer: Option B

Explanation:

0.75 = 75/100 = 3/4

Read more from - Decimal Fraction Questions Answers
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