Decimal Numbers Quiz Set 001 | Maths Aptitude Mock Test on Decimals and Floating Point Numbers Set 1 | mock tests for Bank PO, SSB/SSC Exams, SO Clerical Exam, GATE Exam, LIC AO, GIC AO, etc.

**Your Score**
Correct Answers:
Wrong Answers:
Unattempted:

Question 1

What is ${0.40 × 0.40 × 0.40 + 0.05 × 0.05 × 0.05}/{2.00 × 2.00 × 2.00 + 0.25 × 0.25 × 0.25}$?

$1/5^3$.

$1/5^2$.

$1/5$.

$1/5^4$.

Soln.
Ans: a

By inspection, the given ratio is same as ${0.40 × 0.40 × 0.40 + 0.05 × 0.05 × 0.05}/{5^3 × ({0.40 × 0.40 × 0.40 + 0.05 × 0.05 × 0.05})}$ which is $1/5^3$.

Solution | Discuss! | Chapters»

Question 2

What is $18{54/10000}$?

18.0054.

18.054.

18.00054.

18.54.

Soln.
Ans: a

The given expression can be written as ${18 × 10000 + 54}/10000$ which is same as $180054/10000$ which gives 18.0054

Solution | Discuss! | Chapters»

Question 3

For what value of x would this expression be a perfect square: $6.16 × 6.16 - x × 6.16 + 0.3 × 0.3$?

0.6.

0.06.

0.0006.

6.0.

Soln.
Ans: a

Comparing the given expression with $a^2 - 2 × a ×b + b^2 = (a - b)^2$, we see that if a = 6.16, and b = 0.3 then by inspection, x should be equal to 2b = 2 × 0.3 = 0.6.

Solution | Discuss! | Chapters»

Question 4

What is ${(-63) × 2.5 - 95 × (-6.3)}/6.4$?

$68{29/32}$.

$68{27/32}$.

$68{31/32}$.

$68{28/32}$.

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: ${(-63) × 25 - 95 × (-63)}/64$. We can now simpilfy the minus signs to get ${(95 × 63) - (63 × 25)}/64$ which equals ${2205/32}$, which is same as: $68{29/32}$

Solution | Discuss! | Chapters»