Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

One-half of the cube-root of which number is 0.3?

### Question 2

If $√5$ = 2.24, then what is the value of ${√5}/2$ − $2/{√5}$ + $√125$?

**A**

11.404.

**B**

1.414.

**C**

22.414.

**D**

0.707

**Soln.**

**Ans: a**

The given expression can be simplified to ${{(√5)^2} - {2 × 2} + {2 × √5 × √{5 × 5^2}}}/{2 × √5}$, which is same as ${5 - 4 + 50}/{2 × √5}$, which is same as ${51/{2 × √5}$. Rationalizing, we get ${51/{2 × √5} × {√5/√5}$ which gives ${51√5}/10$ which = 11.404.

### Question 3

If $√2$ = 1.41, then what is the value of ${√2}/5$ − $2/{√2}$ + $√8$?

**A**

1.697.

**B**

1.414.

**C**

1.732.

**D**

0.707.

**Soln.**

**Ans: a**

The given expression can be simplified to ${{(√2)^2} - {5 × 2} + {5 × √2 × √{2 × 2^2}}}/{5 × √2}$, which is same as ${2 - 10 + 20}/{5 × √2}$, which is same as ${12/{5 × √2}$. Rationalizing, we get ${12/{5 × √2} × {√2/√2}$ which gives ${12√2}/10$ which = 1.697.

### Question 4

If x = 0.8547, then what is the value of $4x + √{16x^2 - 8x + 1}$?

### Question 5

What is √0.0004?

### More Chapters | See All...

Decimal Numbers | Image Series | Sitting Arrangements | Logarithms | Cubes and Dice | Pipes and Cisterns | Percentages | Compound Interest | HCF and LCM | Mirror Images | More...

This Blog Post/Article "Square and Cube Roots Quiz Set 011" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2017-05-17.