Question Detail

Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]

Answer: Option D

Explanation:

b-[b-(a+b)-{b-(b-a+b)}+2a]
=b-[b-a-b-{b-(2b-a)}+2a]
=b-[-a-{b-2b+a}+2a]
=b-[-a-{-b+a}+2a]
=b-[-a+b-a+2a]
=b-[-2a+b+2a]
=b-b
=0

1. Simplify
$\begin{aligned} 1+\frac{1}{2}+\frac{1}{4}+\frac{1}{7}+\frac{1}{14}+\frac{1}{28} = ? \end{aligned}$

Answer: Option A

Explanation:

By taking LCM we get
=

$\begin{aligned} \frac{28+14+7+4+2+1}{28} = \frac{56}{28} = 2\end{aligned}$

2. $\begin{aligned} (3\frac{1}{4}\div \{1\frac{1}{4} - \frac{1}{2}(2\frac{1}{2} - \overline {\frac{1}{4} - \frac{1}{6}} ) \} ) \end{aligned}$

Answer: Option A

Explanation:

Tip:
As you can see, there is bar over

$\begin{aligned} \overline{\frac{1}{4}-\frac{1}{6}} \end{aligned}$
So their sign will be changed from - to + as

$\begin{aligned} \frac{1}{4}+\frac{1}{6} \end{aligned}$

3. Find the value of X
X = (6/119) * (63/8) * (17/9)

Answer: Option C

4. 5004 / 139 - 6

Answer: Option D

5. Along a yard 225 metres long, 26 trees are palnted at equal distances, one tree being at each end of the yard. What is the distance between two consecutive trees

Answer: Option B

Explanation:

26 trees have 25 gaps between them,
Required distance (225/25) = 10

Vishal 11 years ago

b-[b-(a+b)-{b-(b-a+b)}+2a]
=b-[b-a-b-{b-(2b-a)}+2a]
=b-[-a-{b-2b+a}+2a]
=b-[-a-{-b+a}+2a]
=b-[-a+b-a+2a]
=b-[-2a+b+2a]
=b-b
=0
arun 11 years ago

when sq bracket will be open, then +2a will be convert into -2a. am i right?

Question Detail

Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]

1. Simplify
$\begin{aligned} 1+\frac{1}{2}+\frac{1}{4}+\frac{1}{7}+\frac{1}{14}+\frac{1}{28} = ? \end{aligned}$

2. $\begin{aligned} (3\frac{1}{4}\div \{1\frac{1}{4} - \frac{1}{2}(2\frac{1}{2} - \overline {\frac{1}{4} - \frac{1}{6}} ) \} ) \end{aligned}$

3. Find the value of X
X = (6/119) * (63/8) * (17/9)

4. 5004 / 139 - 6

5. Along a yard 225 metres long, 26 trees are palnted at equal distances, one tree being at each end of the yard. What is the distance between two consecutive trees

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Vishal 11 years ago

arun 11 years ago

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Question Detail

Simplfy b - [b -(a+b) - {b - (b - a+b)} + 2a]

1. Simplify 1+12+14+17+114+128=?\begin{aligned} 1+\frac{1}{2}+\frac{1}{4}+\frac{1}{7}+\frac{1}{14}+\frac{1}{28} = ? \end{aligned}

2. (314÷{114−12(212−¯14−16)})\begin{aligned} (3\frac{1}{4}\div \{1\frac{1}{4} - \frac{1}{2}(2\frac{1}{2} - \overline {\frac{1}{4} - \frac{1}{6}} ) \} ) \end{aligned}

3. Find the value of X X = (6/119) * (63/8) * (17/9)

4. 5004 / 139 - 6

5. Along a yard 225 metres long, 26 trees are palnted at equal distances, one tree being at each end of the yard. What is the distance between two consecutive trees

Thanks ! Your comment will be approved shortly !

Vishal 11 years ago

arun 11 years ago

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Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]

1. Simplify
$\begin{aligned} 1+\frac{1}{2}+\frac{1}{4}+\frac{1}{7}+\frac{1}{14}+\frac{1}{28} = ? \end{aligned}$

2. $\begin{aligned} (3\frac{1}{4}\div \{1\frac{1}{4} - \frac{1}{2}(2\frac{1}{2} - \overline {\frac{1}{4} - \frac{1}{6}} ) \} ) \end{aligned}$

3. Find the value of X
X = (6/119) * (63/8) * (17/9)