Decimal Numbers Quiz Set 014

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Question 1

What is $61{22/100000}$?

 A

61.00022.

 B

0.142.

 C

0.0142.

 D

0.00142.

Soln.
Ans: a

The given expression can be written as ${61 × 100000 + 22}/100000$ which is same as $6100022/100000$ which gives 61.00022


Question 2

If $5.57/0.4$ = 13.925, then $0.0557/4$ = ?

 A

0.013925.

 B

0.13925.

 C

0.0013925.

 D

1.3925.

Soln.
Ans: a

Numerator is divided by 100, and denominator multiplied by 10, so the answer should get divided by 1000.


Question 3

What is z in $9.477 + 0.2 - z = 0.02$?

 A

9.657.

 B

8.657.

 C

9.756.

 D

8.756.

Soln.
Ans: a

z = (0.2 + 9.477) - 0.02 = 9.657.


Question 4

For what value of x would this expression be a perfect square: $9.14 × 9.14 + x × 9.14 + 0.1 × 0.1$?

 A

0.2.

 B

2.0.

 C

0.002.

 D

0.02.

Soln.
Ans: a

Comparing the given expression with $a^2 + 2 × a ×b + b^2 = (a + b)^2$, we see that if a = 9.14, and b = 0.1 then by inspection, x should be equal to 2b = 2 × 0.1 = 0.2.


Question 5

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.


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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 014" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-04-07.

Posted by Parveen(Hoven),
Aptitude Trainer


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