Decimal Numbers Quiz Set 012 | Maths Aptitude Mock Test on Decimals and Floating Point Numbers Set 12 | mock tests for Bank PO, SSB/SSC Exams, SO Clerical Exam, GATE Exam, LIC AO, GIC AO, etc.

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Question 1

What is y in $9.69 + 0.1 + y = 0.09$?

-9.7.

+9.7.

-7.9.

+7.9.

Soln.
Ans: a

y = 0.09 - (0.1 + 9.69) = -9.7.

Solution | Discuss! | Chapters»

Question 2

For what value of x would this expression be a perfect square: $9.14 × 9.14 + x × 9.14 + 0.1 × 0.1$?

0.2.

2.0.

0.002.

0.02.

Soln.
Ans: a

Comparing the given expression with $a^2 + 2 × a ×b + b^2 = (a + b)^2$, we see that if a = 9.14, and b = 0.1 then by inspection, x should be equal to 2b = 2 × 0.1 = 0.2.

Solution | Discuss! | Chapters»

Question 3

What is $5.463 + 0.9 + 0.09$?

6.453.

6.345.

6.545.

6.553.

Soln.
Ans: a

By simple addition we get $5.463 + 0.9 + 0.09 = 6.453$.

Solution | Discuss! | Chapters»

Question 4

What is z in $2.285 + 0.4 - z = 0.02$?

+2.665.

-2.665.

+2.556.

-2.556.

Soln.
Ans: a

z = (0.4 + 2.285) - 0.02 = 2.665.

Solution | Discuss! | Chapters»

Question 5

For what value of x would this expression be a perfect square: $8.88 × 8.88 + x × 8.88 + 0.2 × 0.2$?

0.4.

0.8.

0.2.

0.1.

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 = 0.2 then by inspection, x should be equal to 2b = 2 × 0.2 = 0.4.

Solution | Discuss! | Chapters»