Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

0.00218828 is same as?

### Question 2

What is ${(-32) × 2.9 - 47 × (-3.8)}/6.9$?

**A**

$12{10/23}$.

**B**

$12{9/23}$.

**C**

$12{7/23}$.

**D**

$12{11/23}$.

**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: ${(-32) × 29 - 47 × (-38)}/69$. We can now simpilfy the minus signs to get ${(47 × 38) - (32 × 29)}/69$ which equals ${286/23}$, which is same as: $12{10/23}$

### Question 3

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

### Question 4

What is $0.15966/0.02$?

### Question 5

Which is the smallest?

**A**

$0.32^3$.

**B**

$1/0.32$.

**C**

$0.32$.

**D**

$0.32^2$.

**Soln.**

**Ans: a**

We know that if a number is less than 1, then it becomes smaller and smaller as it is raised to higher and higher positive powers. Now, $1/0.32$ is same as $0.32^{-1}$. The three powers of 0.32 given to us are -1, 1, 2 and 3. Out of these 3 is the most positive, so, $0.32^3$ is the smallest.

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This Blog Post/Article "Decimal Numbers Quiz Set 009" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2020-02-07. Published on: 2016-04-21