Decimal Numbers Quiz Set 020

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Question 1

What is ${5.05^2 - 4.75^2}/{5.05 - 4.75}$?

 A

9.80.

 B

8.90.

 C

10.20.

 D

8.49.

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 = 5.05 + 4.75 = 9.80.


Question 2

If $8.78/0.9$ = 9.755555, then $0.0878/9$ = ?

 A

0.009755555.

 B

0.09755555.

 C

0.9755555.

 D

9.755555.

Soln.
Ans: a

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


Question 3

589427 is same as?

 A

$5.89427 × 10^{5}$.

 B

$5.89427 × 10^{4}$.

 C

$5.89427 × 10^{3}$.

 D

$5.89427 × 10^{6}$.

Soln.
Ans: a

Question 4

What is z in $8.348 + 0.6 - z = 0.05$?

 A

+8.898.

 B

-8.898.

 C

+6.898.

 D

-6.898.

Soln.
Ans: a

z = (0.6 + 8.348) - 0.05 = 8.898.


Question 5

What is 0.0061 × 0.84?

 A

$5.124 × 10^{-3}$.

 B

$5.124 × 10^{-2}$.

 C

$5.124 × 10^{-1}$.

 D

$5.124 × 10^{-4}$.

Soln.
Ans: a

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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 020" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-06-24.

Posted by Parveen(Hoven),
Aptitude Trainer


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