Question Detail

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

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

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

47.95
44.95
43.95
40.95

Answer: Option A

2. What is difference between biggest and smallest fraction among 2/3, 3/4, 4/5 and 5/6

Answer: Option C

Explanation:

2/3 = .66, 3/4 = .75, 4/5 = .8 and 5/6 = .833

So biggest is 5/6 and smallest is 2/3

Their difference is 5/6 - 2/3 = 1/6

3. 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:

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

4. 0.5 * 0.002 = ?

0.0001
0.01
0.1
0.001

Answer: Option D

5. Evaluate 2.5 / .0005

5000
500
50000
50

Answer: Option A

Explanation:

2.5 * 10000 / 5 = 25000/5 = 5000

Question Detail

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

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

2. What is difference between biggest and smallest fraction among 2/3, 3/4, 4/5 and 5/6

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

4. 0.5 * 0.002 = ?

5. Evaluate 2.5 / .0005

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Question Detail

Evaluate 2.392−1.6122.39−1.61\begin{aligned} \frac{2.39^2 - 1.61^2}{2.39 - 1.61} \end{aligned}

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

2. What is difference between biggest and smallest fraction among 2/3, 3/4, 4/5 and 5/6

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

4. 0.5 * 0.002 = ?

5. Evaluate 2.5 / .0005

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

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

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