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Question Detail
Which is smallest
- 13/16
- 15/19
- 17/21
- 7/8
Answer: Option B
1. 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}
2. What decimal of an hour is a second
- .0028
- .0027
- .0026
- .0025
Answer: Option B
Explanation:
1/(60*60) = 1/3600 = .0027
3. 0.7683 + 0.369 + 0.05 + 0.8 = ?
- 1.9873
- 0.9873
- 1.8873
- 1.9872
Answer: Option A
4. \begin{aligned}
(0.34\overline{67} + 0.13\overline{33}) = ?
\end{aligned}
- \begin{aligned} 0.048\overline{01} \end{aligned}
- \begin{aligned} 4.8\overline{01} \end{aligned}
- \begin{aligned} 48.\overline{01} \end{aligned}
- \begin{aligned} 0.48\overline{01} \end{aligned}
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}
5. 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
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