Decimal Numbers Quiz Set 003

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Question 1

What is $9.326 + 0.7 + 0.03$?

 A

10.056.

 B

11.056.

 C

12.056.

 D

9.056.

Soln.
Ans: a

By simple addition we get $9.326 + 0.7 + 0.03 = 10.056$.


Question 2

What is $6.062 - (-0.8) + 0.03 - (-0.09)$?

 A

6.982.

 B

7.982.

 C

5.982.

 D

8.982.

Soln.
Ans: a

The given expression is same as $6.062 + 0.8 + 0.03 + 0.09$, then by simple addition we get $6.062 + 0.8 + 0.03 + 0.09 = 6.982$.


Question 3

What is ${94 × 9.8 - 73 × 8.9}/8.2$?

 A

$33{9/82}$.

 B

$33{7/82}$.

 C

$33{5/82}$.

 D

$33{11/82}$.

Soln.
Ans: a

Observe that all fractional numbers are having one digit to the right of the dot. So we can cancel all the dots and get a plain expression: ${94 × 98 - 73 × 89}/82$ which equals ${2715/82}$, which is same as: $33{9/82}$


Question 4

What is ${5.32^2 - 5.65^2}/{5.32 - 5.65}$?

 A

10.97.

 B

+0.33.

 C

-10.97.

 D

-.33.

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 = 5.32 + 5.65 = 10.97.


Question 5

What is 0.0027 × 0.04?

 A

$1.08 × 10^{-4}$.

 B

$1.08 × 10^{-3}$.

 C

$1.08 × 10^{-2}$.

 D

$1.08 × 10^{-5}$.

Soln.
Ans: a

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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 003" 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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