Decimal Numbers Quiz Set 006

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Question 1

14687 is same as?

 A

$1.4687 × 10^{4}$.

 B

$1.4687 × 10^{3}$.

 C

$1.4687 × 10^{5}$.

 D

$1.4687 × 10^{2}$.

Soln.
Ans: a

Question 2

What is y in $1.74 + 0.1 + y = 0.05$?

 A

-1.79.

 B

1.5.

 C

0.15.

 D

0.015.

Soln.
Ans: a

y = 0.05 - (0.1 + 1.74) = -1.79.


Question 3

What is x in ${374/0.0374} = {3.74/x}$?

 A

$3.74 × 10^{-4}$.

 B

$3.74 × 10^{-3}$.

 C

$3.74 × 10^{-5}$.

 D

$3.74 × 10^{-2}$.

Soln.
Ans: a
Transposing, x = $3.74 × {0.0374/374}$ which gives 0.000374, which, in scientific form is $3.74 × 10^{-4}$.

Question 4

What is $3.911 + 0.1 + 0.05$?

 A

4.061.

 B

3.996.

 C

3.975.

 D

4.050.

Soln.
Ans: a

By simple addition we get $3.911 + 0.1 + 0.05 = 4.061$.


Question 5

For what value of x would this expression be a perfect square: $8.88 × 8.88 - x × 8.88 + 0.5 × 0.5$?

 A

1.

 B

0.1.

 C

0.001.

 D

0.01.

Soln.
Ans: a

Comparing the given expression with $a^2 - 2 × a ×b + b^2 = (a - b)^2$, we see that if a = 8.88, and b = 0.5 then by inspection, x should be equal to 2b = 2 × 0.5 = 1.


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Creative Commons License
This Blog Post/Article "Decimal Numbers Quiz Set 006" 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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