Decimal Numbers Quiz Set 017

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Question 1

What is ${3.67^3 - 0.10^3}/{3.67^2 + 0.367 + 0.10^2}$?

 A

+3.57.

 B

+3.77

 C

-3.57.

 D

-3.77.

Soln.
Ans: a

We know ${a^3 - b^3}/{a^2 + ab + b^2}$ is same as ${(a - b) × (a^2 + ab + b^2)}/{a^2 + ab + b^2}$ which is same as a - b. So we get a - b = 3.67 - 0.10 = 3.57.


Question 2

What is $0.17386/0.0002$?

 A

869.3.

 B

86.93.

 C

8.693.

 D

8693.

Soln.
Ans: a

The given expression can be written as ${17386/2} × {10000/100000}$ which is same as ${17386/2} × {1/10}$, which is same as $8693 × {1/10}$, which is same as 869.3


Question 3

What is 0.0088 × 0.38?

 A

$3.344 × 10^{-3}$.

 B

$3.344 × 10^{-2}$.

 C

$3.344 × 10^{-1}$.

 D

$3.344 × 10^{-4}$.

Soln.
Ans: a

Question 4

What is ${4.42^2 - 4.05^2}/{4.42 - 4.05}$?

 A

8.47.

 B

7.47.

 C

6.47.

 D

9.47.

Soln.
Ans: a

We know $a^2 - b^2$ = $(a - b) × (a + b)$. So ${a^2 - b^2}/{a - b}$ is same as a + b. We get a + b = 4.42 + 4.05 = 8.47.


Question 5

What is $0.056296/0.008$?

 A

7.037.

 B

7.37.

 C

7.0037.

 D

7.00037.

Soln.
Ans: a

The given expression can be written as ${56296/8} × {1000/1000000}$ which is same as ${56296/8} × {1/1000}$, which is same as $7037 × {1/1000}$, which is same as 7.037


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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 017" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-10-26.

Posted by Parveen(Hoven),
Aptitude Trainer


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