Decimal Numbers Quiz Set 007

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Question 1

If $8.77/0.6$ = 14.61667, then $0.0877/6$ = ?

 A

0.01461667.

 B

0.1461667.

 C

0.001461667.

 D

1.461667.

Soln.
Ans: a

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


Question 2

What is $9.102 - (-0.5) + 0.04 - (-0.02)$?

 A

9.662.

 B

8.662.

 C

7.662.

 D

5.662.

Soln.
Ans: a

The given expression is same as $9.102 + 0.5 + 0.04 + 0.02$, then by simple addition we get $9.102 + 0.5 + 0.04 + 0.02 = 9.662$.


Question 3

Which is the smallest?

 A

$0.35^3$.

 B

$1/0.35$.

 C

$0.35$.

 D

$0.35^2$.

Soln.
Ans: a

We know that if a number is less than 1, then it becomes smaller and smaller as it is raised to higher and higher positive powers. Now, $1/0.35$ is same as $0.35^{-1}$. The three powers of 0.35 given to us are -1, 1, 2 and 3. Out of these 3 is the most positive, so, $0.35^3$ is the smallest.


Question 4

For what value of x would this expression be a perfect square: $6.73 × 6.73 - x × 6.73 + 0.2 × 0.2$?

 A

0.4.

 B

0.04.

 C

0.004.

 D

4.0.

Soln.
Ans: a

Comparing the given expression with $a^2 - 2 × a ×b + b^2 = (a - b)^2$, we see that if a = 6.73, and b = 0.2 then by inspection, x should be equal to 2b = 2 × 0.2 = 0.4.


Question 5

What is x in $0.055/x = 0.55$?

 A

0.1.

 B

1.0.

 C

0.01.

 D

0.001.

Soln.
Ans: a

The expression becomes $x = {55/55} × {100/1000}$ = 0.1.


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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 007" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2019-08-18.

Posted by Parveen(Hoven),
Aptitude Trainer


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