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Square Root and Cube Root+Solved

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Saturday, January 12, 2019

Which least number should be added to 2600 to make it a perfect square?

January 12, 2019 |

General Aptitude, RRB ASM Exam (Bhubaneshwar) 2009, Solved, Square Root and Cube Root

Which least number should be added to 2600 to make it a perfect square?

A3

B39

C1

D5

View Answer

Wednesday, December 26, 2018

The cube root of (−2,16,000) is

December 26, 2018 |

General Aptitude, RRB TC CC Exam (Mumbai) 2006, Solved, Square Root and Cube Root

The cube root of (−2,16,000) is

A-60

B60

C-70

D80

Akilesh Kharvi Nov 7 '2016 at 19:10

Answer is : -60

$\sqrt[3]{-216000}$

$= \sqrt[3]{-216*1000}$

$=\sqrt[3]{(-6)^3 * 10^3}$

On Cancelling Cube root

=(-6)(10)

=-60

View Answer

The result of division

December 26, 2018 |

General Aptitude, RRB TC CC Exam (Mumbai) 2006, Solved, Square Root and Cube Root

The result of division by a +b is

A

B

C

D

Akilesh Kharvi Nov 6 '2016 at 23:6

Answer is : $a^2-ab+b^2$

$a^3 + b^3 = \big(a+b\big) \big(a^2-ab +b^2\big)$

$\therefore \frac{a^3 +b^3}{a+b} = a^2-ab+b^2$

View Answer

Wednesday, December 19, 2018

sqrt 0.0081

December 19, 2018 |

General Aptitude, RRB TC CC Exam (Bangalore) 2007, Solved, Square Root and Cube Root

A0.09

B0.9

C0.91

D0.009

Nithin K Thu Sep 29 2016 12:30:00 GMT+0530 (IST)

Answer is : 0.09

$\sqrt{0.0081} = \sqrt{81 \over 10000}$

$=\sqrt{9^2 \over 100^2}$

$=\frac{9}{100}$

$=0.09$

View Answer

Monday, December 17, 2018

A General of army wants to form a solid square from 36562

December 17, 2018 |

General Aptitude, RRB TC CC Exam (Bangalore) 2007, Solved, Square Root and Cube Root

A General of army wants to form a solid square from 36562 armies. After arrangement, he found some armies left. How many armies were left?

A97

B36

C65

D81

gorak Dec 18 '2018 at 12:27

Answer is: [D] 81

Explanation:

According to question
Total Number of Army men = 36562

Thus dividing these total number of army men into a square means

$a ^2 = 36562$
Thus
a = 191 When 81 army men are left

Thus Total number of army men left is 81

View Answer