Puzzle time!

[prasad1]

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The one who makes it does not need it; the one who buys it does not use it; the one who uses it does not see it!

What is it?

I think it is coffin.
But it is not right. People do choose and buy the coffin, and eventually the person who makes it will need it, the person who uses it does see( sometimes).

 

[Raji Ram]

I think it is coffin.
But it is not right. People do choose and buy the coffin, and eventually the person who makes it will need it, the person who uses it does see( sometimes).

Coffin is the answer.

The person who makes the coffin - unless he makes for himself, to be used later on - does not need it.

Oh! Some persons choose their own coffin? Strange!

 

[mskmoorthy]

Coffin is the answer.

The person who makes the coffin - unless he makes for himself, to be used later on - does not need it.

Oh! Some persons choose their own coffin? Strange!

Prasadji's question is related to this philosophical paradox (related to the Betrand Russel Paradox) Please see this link for further details https://en.wikipedia.org/wiki/Barber_paradox

 

[prasad1]

Coffin is the answer.

The person who makes the coffin - unless he makes for himself, to be used later on - does not need it.

Oh! Some persons choose their own coffin? Strange!

Not at all.
http://www.comparethecoffin.com/coffins

 

[Raji Ram]

Thanks for the info Prasad Sir! ( Anyway, we tambrahms don't need coffins! )

 

[Raji Ram]

I find 'kadi' riddles printed on popsicle sticks.

Here is one of them:

Why are the Mathematics books always stressed?

Popsicles - Courtesy: Google images.

 

[mskmoorthy]

Adapted from UPSC-CSAT Paper 2 (2014)and changed from multiple choice:


N identical cards are placed on a table. Each card has number '1' marked on one side and number '2' marked on its other side. All the six cards are placed in such a manner that the number '1' is on the upper side. In one try, exactly four (neither more nor less) cards are turned upside down. In how many Ieast number of tries can the cards be turned upside down such that all the six cards show number '2' on the upper side?

a) When N=6 (original question from 2014 UPSC question 80)
b) When N=10
c) What is the general for N=4k+2
d) When N=7

 

[Raji Ram]

I could find the answer only for 6 and 10 cards as 3 minimum moves.

When there are 10 cards:

1 1 1 1 1 1 1 1 1 1
2 2 2 2 1 1 1 1 1 1
2 2 2 1 2 2 2 1 1 1
2 2 2 2 2 2 2 2 2 2

When there are 6 cards:

1 1 1 1 1 1
2 2 2 2 1 1
2 1 1 1 2 1
2 2 2 2 2 2

 

[Raji Ram]

Awaiting answer for the kadi riddle posted earlier.

 

[mskmoorthy]

Awaiting answer for the kadi riddle posted earlier.

May be the mathematics books have so many problems

 

[Raji Ram]

May be the mathematics books have so many problems

:thumb:

 

[கால பைரவன்]

Adapted from UPSC-CSAT Paper 2 (2014)and changed from multiple choice:


N identical cards are placed on a table. Each card has number '1' marked on one side and number '2' marked on its other side. All the six cards are placed in such a manner that the number '1' is on the upper side. In one try, exactly four (neither more nor less) cards are turned upside down. In how many Ieast number of tries can the cards be turned upside down such that all the six cards show number '2' on the upper side?

a) When N=6 (original question from 2014 UPSC question 80)
b) When N=10
c) What is the general for N=4k+2
d) When N=7

For C, ans = k+1 if k>1
k+2 if k=1

For D, i could not find a solution. May be not possible, because number of 1's after any number of steps is always odd.

 

[auh]

The minimum would always be 3 for cards > 6.

For odd nos. it is infinite.

 

[auh]

May be the mathematics books have so many problems

But since they have solutions to all the problems, it should also be the happiest?

 

[mskmoorthy]

I could find the answer only for 6 and 10 cards as 3 minimum moves.

When there are 10 cards:

1 1 1 1 1 1 1 1 1 1
2 2 2 2 1 1 1 1 1 1
2 2 2 1 2 2 2 1 1 1
2 2 2 2 2 2 2 2 2 2

When there are 6 cards:

1 1 1 1 1 1
2 2 2 2 1 1
2 1 1 1 2 1
2 2 2 2 2 2

For C, ans = k+1 if k>1
k+2 if k=1

For D, i could not find a solution. May be not possible, because number of 1's after any number of steps is always odd.

:clap2: :thumb:

The only thing that is left is that they are the smallest possible. For a general 4k+2, k>1 we know k flips will not be sufficient (as it can turn only 4k cards). For k=6, we know 2 will not be sufficient.

 

[mskmoorthy]

The minimum would always be 3 for cards > 6.

For odd nos. it is infinite.

With 3, you can turn only 12 cards - Hence 3 may be minimum - but you cannot do with 3 for 20 cards or 200 cards - or can you?

 

[mskmoorthy]

But since they have solutions to all the problems, it should also be the happiest?

Then "they" will be happiest - but there are so many other mathematics books which do nto give solutions to all problems (may be odd or even numbered problems)

 

[auh]

With 3, you can turn only 12 cards - Hence 3 may be minimum - but you cannot do with 3 for 20 cards or 200 cards - or can you?

Sir?

I meant 3 as the minimum moves...

 

[mskmoorthy]

mIS

 

[mskmoorthy]

From a clue in yesterday's New york times crossword Puzzle

Longest word in English containing only one vowel (9 letters long)

Hint: The word is a plural

 

[vgane]

From a clue in yesterday's New york times crossword Puzzle

Longest word in English containing only one vowel (9 letters long)

Hint: The word is a plural

I guess we should not use google for this...Let us try without googling...I tried..Hence disqualified

 

[Raji Ram]

...... Longest word in English containing only one vowel (9 letters long)

Hint: The word is a plural

I tried words starting with 'phy' 'sy' etc but could find none with 9 letters.

Then I thought, I am NOT strong in English; which lead me to the word 'strength', the plural of which is the answer! :thumb:

P.S: I spend all my free time playing flip words mini clip!

 

[prasad1]

strengths.

 

[mskmoorthy]

I tried words starting with 'phy' 'sy' etc but could find none with 9 letters.

Then I thought, I am NOT strong in English; which lead me to the word 'strength', the plural of which is the answer! :thumb:

P.S: I spend all my free time playing flip words mini clip!

strengths.

:thumb: :thumb: :thumb:

 

[Raji Ram]

My son, as a kid, used to tell the difference between drinking whey and milk!

The first makes him strong and the second gives him strength!