Decimal Fraction | Aptitude Questions and Answers | Aptitude Free Online-Tests | LucentBlackBoard

Home > Arithmetic Aptitude > Decimal Fraction > Questions and Answers

01.

Which of the following is equal to 3.14 * 106 ?

A.	314	B.	3140
C.	3140000	D.	None of these

Answer and Explanation

Answer: 3140000

Explanation:
3.14 * 106 = 3.140000 * 1000000 = 3140000

View Answer |

Report |

Discuss in Forum

02.

0.000006723 when expressed in scientific notation is

A.	6723 * 10-5	B.	67.23 * 10-7
C.	6.273 * 10-6	D.	None of these

Answer and Explanation

Answer: None of these

Explanation:
0.000006723 = (0.000006723 * 106) / 106 = 6.723 / 106 = 6.723 * 10-6

View Answer |

Report |

Discuss in Forum

03.

. If 1.125 * 10k = 0.001125. then the value of k is :

A.	-4	B.	-3
C.	-2	D.	-1

Answer and Explanation

Answer: -3

Explanation:
10k = 0.001125 / 1.125 – 1.125 / 1125 = (1.125 * 103) / (1125 * 103) = 1/103 = 10-3

View Answer |

Report |

Discuss in Forum

04.

The value of (489.1375 x 0.0483 x 1.956) / (0.0873 x 92.581 x 99.749 ) is closet to:

A.	0.006	B.	0.06
C.	0.6	D.	6

Answer and Explanation

Answer: 0.06

Explanation:
(489.1375 x 0.0483 x 1.956) / (0.0873 x 92.581 x 99.749) = (489 x 0.05 x 2) / (0.09 x 93 x 100)

= (489) / (9 x 93 x 10)

= 163 / 279 x 1 / 10

= 0.58 / 10

= 0.058 = 0.06.

View Answer |

Report |

Discuss in Forum

05.

If 4.5x = 0.04y, then find the value of {(y - x) / (y + x)}

A.	23/27	B.	22.3/227
C.	2230/227	D.	223/227

Answer and Explanation

Answer: 223/227

Explanation:

View Answer |

Report |

Discuss in Forum

06.

A.	3.42	B.	6.1
C.	4.67	D.	None of these

Answer and Explanation

Answer: 6.1

Explanation:

View Answer |

Report |

Discuss in Forum

07.

A.	0.2	B.	0.02
C.	2	D.	0.05

Answer and Explanation

Answer: 0.2

Explanation:

View Answer |

Report |

Discuss in Forum

LucentBlackBoard.com has the web's largest collection of over 15,000 aptitude questions and answers with detailed explanation which include subjects like Arithmetic Aptitude, Logical Reasoning, Verbal Ability, General Knowledge, Programming Skills and more!

Our online education portal provides a unique and standard learning experience for students. We enable the students to prepare for most of the entrance and competitive exams like MBA (MAT, GMAT), Engineering (IIT-JEE, AIEEE, GATE), Employment (IAS, Bank PO, Railway, UGCNET), Civil Services and many more. We bring you the best in education by providing technical excellence and creating innovative solutions. We provide facility for online test preparation that offers 24/7 access to relevant subject matter and relative tests. These test preparations help the students to groom themselves and get prepared before actually facing the examination.