Q:

Logical puzzle

At a restaurant, how could you choose one out of three desserts with equal probability with the help of a coin? What if the coin is biased and the bias is unknown?

Answer

Our solution:

Toss the coin twice.
Let TH, HT and TT correspond to the three choices.
And if you get HH, just repeat (so it takes 8/3 tosses on average).

BIASED COIN

If the coin was biased, TH and HT would occur with equal probability.
So you could assign THHT, HTTH and THTH to the three choices, with other 4-toss outcomes rejected.
Or you could assign HTT, THT and TTH to the three choices, with other 3-toss outcomes rejected.

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Subject: Logic Puzzles

18 4507

Q:

Who has been selected for the 2016 National Geoscience Award in the field of geo-environmental studies?

A) Keshav Krishna	B) Ashok Kumar Singhvi
C) P.V. Joseph	D) Vishnu Deo Sai

Answer & Explanation Answer: A) Keshav Krishna

Explanation:

Dr. A Keshav Krishna, a scientist at the National Geophysical Research Institute (NGRI), has been selected for 2016 National Geoscience Award by the Ministry of Mines in the field of Geo-environmental studies in applied geosciences.

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Filed Under: Honours and Awards

7 4506

Q:

By volume, 21% of air is _______________.

A) hydrogen	B) oxygen
C) nitrogen	D) carbon dioxide

Answer & Explanation Answer: B) oxygen

Explanation:

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Filed Under: Chemistry
Exam Prep: Bank Exams

0 4506

Q:

' Samjhauta Express ' runs between which of the following two stations

A) New Delhi - Wagah	B) New Delhi - Lahore
C) Amritsar - Wagah	D) Amritsar - Lahore

Answer & Explanation Answer: B) New Delhi - Lahore

Explanation:

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Filed Under: Indian Economy

9 4504

Q:

Which is the only snake that builds nests?

A) Viper	B) King Cobra
C) Anaconda	D) Python

Answer & Explanation Answer: B) King Cobra

Explanation:

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Filed Under: Animals and Birds

19 4504

Q:

On 2 January 2018, Parliament passed NABARD (Amendment) Bill, 2017 which seeks to amend ______.

A) NABARD Act, 1975	B) NABARD Act, 1961
C) NABARD Act, 1981	D) NABARD Act, 1991

Answer & Explanation Answer: C) NABARD Act, 1981

Explanation:

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Filed Under: Indian Politics
Exam Prep: Bank Exams

0 4503

Q:

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?

(1) $K_{2} O < N a_{2} O < A l_{2} O_{3} < M g O$

(2) $A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

(3) $M g O < K_{2} O < A l_{2} O_{3} < N a_{2} O$

(4) $N a_{2} O < K_{2} O < M g O < A l_{2} O_{3}$

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: B) Option 2

Explanation:

While moving from left to right in periodic table basic character of oxide of elements will decrease.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{A l_{2} O_{3} < M g O < N a_{2} O}$

and while descending in the group basic character of corresponding oxides increases.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{N a_{2} O < K_{2} O}$

$∴ C o r r e c t O r d e r i s A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

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Filed Under: Chemistry
Exam Prep: AIEEE

14 4501

Q:

Primary growth in plants occurs by

A. Vertical meristem

B. Lateral meristem

C. Intercalary meristem

D. Apical meristem

A) C & D	B) A, B & D
C) A, B, C & D	D) B, C & D

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