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Q:

In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?

Answer

  Zero. You are selecting names from the list, so they are all listed.

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Subject: Math Puzzles

6 7478
Q:

Which of the following was banned by Supreme Court of India in 2014 ?

A) Kick Boxing B) Malla Yuddam
C) Kalari Payattu D) Jallikattu
 
Answer & Explanation Answer: D) Jallikattu

Explanation:
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Filed Under: Indian Culture

86 7470
Q:

Blue litmus paper is converted into red in solution of _______

A) Acid B) Base
C) Alkali D) Salt
 
Answer & Explanation Answer: A) Acid

Explanation:
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Filed Under: Chemistry

12 7469
Q:

Who is often called the 'first African-American' inventor?

A) Bessie Blount B) George Washington Carver
C) Benjamin Banneker D) Elijah McCoy
 
Answer & Explanation Answer: C) Benjamin Banneker

Explanation:
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Filed Under: Inventions

7 7469
Q:

The Administrative council os shivaji was known as 

A) Parishad B) Mantri Parishad
C) Ashta Pradhan D) Rajya Parishad
 
Answer & Explanation Answer: C) Ashta Pradhan

Explanation:
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Filed Under: Indian History

10 7465
Q:

Which district in Andra Pradesh won the MGNREGA annual award for effective implementation of the Mahatma Gandhi National Rural Employment Guarantee Act ?

A) Vizianagaram B) Vizag
C) Guntur D) Srikakulam
 
Answer & Explanation Answer: A) Vizianagaram

Explanation:

The Ministry of Rural Development has selected Vizianagaram as one among the 17 districts across the nation for the MGNREGA annual award for effective implementation of the Mahatma Gandhi National Rural Employment Guarantee Act during 2015-16. The award would be presented at the Mahatma Gandhi NREGA Sammelan to the district programme coordinator and District Collector on June 19, 2017 in New Delhi.

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Filed Under: Honours and Awards
Exam Prep: Bank Exams , CAT
Job Role: Bank PO

8 7461
Q:

Who Invented Worldwide Standard Time Zones ?

A) Charles Richard Drew B) Henry W. Seely
C) Jesse Wilford Reno D) Sir Sandford Fleming
 
Answer & Explanation Answer: D) Sir Sandford Fleming

Explanation:
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Filed Under: Inventions

4 7454
Q:

The oxidation number of Cr in K2Cr2O7 is

A) +6 B) -5
C) +3 D) -4
 
Answer & Explanation Answer: A) +6

Explanation:

We will rewrite the formula as an equation.

2K + 2Cr + 7O = 0

The zero comes from there being no overall charge on the compound.

Each oxidation number is represented by the element's symbol.

Since this compound is not a peroxide or superoxide, the oxidation value for O is -2

K being in group 1 has a +1 charge and therefore has an oxidation number of K is +1

Now, by putting known values in we have:

2(+1) + 2(Cr) + 7(-2) = 0

2 + 2Cr -14 = 0

2Cr = +12

Cr = +6.

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Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , GATE
Job Role: Analyst , Bank Clerk , Bank PO

13 7453