Decimal Numbers Quiz Set 011

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Question 1

What is $0.056296/0.008$?

 A

7.037.

 B

7.37.

 C

7.0037.

 D

7.00037.

Soln.
Ans: a

The given expression can be written as ${56296/8} × {1000/1000000}$ which is same as ${56296/8} × {1/1000}$, which is same as $7037 × {1/1000}$, which is same as 7.037


Question 2

What is ${0.60 × 0.60 × 0.60 + 0.04 × 0.04 × 0.04}/{4.20 × 4.20 × 4.20 + 0.28 × 0.28 × 0.28}$?

 A

$1/7^3$.

 B

$1/7^2$.

 C

$1/7^4$.

 D

$1/7$.

Soln.
Ans: a

By inspection, the given ratio is same as ${0.60 × 0.60 × 0.60 + 0.04 × 0.04 × 0.04}/{7^3 × ({0.60 × 0.60 × 0.60 + 0.04 × 0.04 × 0.04})}$ which is $1/7^3$.


Question 3

What is ${(-82) × 7.2 - 32 × (-3.4)}/2.5$?

 A

$-192{16/25}$.

 B

$-192{12/25}$.

 C

$+192{16/25}$.

 D

$+192{12/25}$.

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: ${(-82) × 72 - 32 × (-34)}/25$. We can now simpilfy the minus signs to get ${(32 × 34) - (82 × 72)}/25$ which equals ${-4816/25}$, which is same as: $-192{16/25}$


Question 4

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 5

For what value of x would this expression be a perfect square: $1.76 × 1.76 + x × 1.76 + 0.5 × 0.5$?

 A

1.

 B

0.1.

 C

0.01.

 D

0.001.

Soln.
Ans: a

Comparing the given expression with $a^2 + 2 × a ×b + b^2 = (a + b)^2$, we see that if a = 1.76, 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 011" 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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