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### Question 1

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

### Question 2

What is $18{54/10000}$?

### Question 3

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

### Question 4

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

**A**

$68{29/32}$.

**B**

$68{27/32}$.

**C**

$68{31/32}$.

**D**

$68{28/32}$.

**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: $68{29/32}$

### Question 5

What is $6.845 - (-0.1) + 0.04 - (-0.08)$?

This Blog Post/Article "Decimal Numbers Quiz Set 001" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2017-06-24.