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Question Detail
Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]
- a
- 2a
- 4a
- 0
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. 18800 / 470 / 20
- 1
- 2
- 3
- 4
Answer: Option B
Explanation:
18800 / 470 / 20 = (18800 / 470) / 20 = 40 / 20 = 2
2. a * b = 2a - 3b + ab, then 3*5 + 5*3 = ?
- 20
- 21
- 22
- 23
Answer: Option C
Explanation:
= 2(3)-3(5)+(3*5) + 2(5)-3(3)+(5*3)
= 6-15+15+10-9+15 = 31-9 = 22
3. Find the value of X
X = (6/119) * (63/8) * (17/9)
- 1/4
- 2/4
- 3/4
- 4
Answer: Option C
4. \begin{aligned} 3034 -(1002 \div 20.04) = ? \end{aligned}
- 1964
- 1984
- 2964
- 2984
Answer: Option D
Explanation:
\begin{aligned}
= 3034 -( \frac{1002}{2004} \times 100)
\end{aligned}
\begin{aligned}
= 3034 - 50 = 2984
\end{aligned}
5. Simplfy
b - [b -(a+b) - {b - (b - a+b)} + 2a]
- a
- 2a
- 4a
- 0
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
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