Thursday, 16 April 2015

Cheryl's Birthday

Well, Cheryl has taken the internet by storm.

If you are wondering "Cheryl Who?", it is the fine young lady who featured in an examination paper in Singapore, with her buddies Albert and Bernard.

The problem, for third grade students, went as below.

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Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates.

May 15      May 16      May 19
June 17     June 18
July 14      July 16
August 14  August 15  August 17

Cheryl then tells Albert and Bernard separately the month and the day of her birthday respectively.

Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard does not know too.

Bernard: At first I don’t know when Cheryl’s birthday is, but I know now.

Albert: Then I also know when Cheryl’s birthday is.

So when is Cheryl’s birthday?
~~

Hope your head isn't spinning already. Spare a thought for the third grade kids. I am sure some of them would have come home crying after seeing this question.

The internet is ablaze with answers.

If you are keen to solve the problem, please pull out your pen, paper and pencils, and set your brains in motion.

If not, just scroll below.
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Some of them say July 16, while other say August 17.

Yours Truly begs to differ.

My choice is :- Cheryl's birthday is June 17.

Why do I say so?

Step 1
Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard does not know too.

Bernard: At first I don’t know when Cheryl’s birthday is, but I know now.

With these statements, 
1. Albert made an assumption.
2. Bernard confirmed the assumption.

The assumption :- Bernard did not know Cheryl's birthday at the beginning.

The only way Bernard would not know Cheryl's birthday at the beginning would be when he gets a date other than 18 and 19.

If Bernard got 18th, he would know its 18 June.

If Bernard got 19th, he would know its 19 May.

This rules out 18 June and 19 May.

With this step, the data looks as below.

May 15      May 16      May 19
June 17     June 18
July 14      July 16
August 14  August 15  August 17

Step 2
Bernard: At first I don’t know when Cheryl’s birthday is, but I know now.

Albert: Then I also know when Cheryl’s birthday is.

With these statements, once again, 
1. Bernard made an assumption (read - I know now)
2. Albert confirmed the assumption (read - Then I also know)

The only way for Bernard to know a date (and make an assumption) and Albert to know a month (and confirm the assumption), and thus, uniquely arrive at the correct birthday, is for the birthday to be 17 June.

Hypothesis (refer to the data at step 1 - pasted below for reference)
May 15      May 16      May 19
June 17     June 18
July 14      July 16
August 14  August 15  August 17

1. If the month was May, the date was ambiguous.

2. Similarly, if the month was July, the date was ambiguous 

3. Similarly, if the month was Aug, the date was ambiguous 

4. But if the date is Jun, the date is non ambiguous. That's the only condition under which Albert can confirm to Bernard's assumption.

Conclusion
This leads me to the conclusion that Cheryl's birthday is on 17 June.

Am I right or wrong? Views are welcome.

Hit the like button or share if friends if you like the reasoning and you agree with the answer.

If you think my reasoning is wrong, feel free to write a comment.

P.S. This puzzle came to my notice just a day after I told my friend, "Life is not about puzzles!!". This was God's own sweet way of telling me, "Son, yes, life is all about puzzles." :-)


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Tuesday, 14 April 2015

Taj Mahal

For many years, the next picture of Taj Mahal adorned my desktop.

Taj Mahal
Taj Mahal

Over several years, I pondered about its eternal beauty, its majestic design, and its amazing background.

Courtesy my two good friends, I had the privilege of seeing the Taj in 2009, on an early April morning.

The elusive staircase to the Taj left me surprised. Its beauty, left me awed.

And this picture today, taken from a drone, brought back memories of the summer of 2009.

Taj Mahal - Wah Taj
Taj Mahal - Wah Taj

Wah Taj!!

P.S. Taj Mahal is in Agra, India. It's a white marbel mausoleum commisioned by the Mughal emperor Shah Jahan in memory of his his third wife, Mumtaz Mahal. Read more if you want to know more.


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Love Your Job

Next time you think you don't love your job, look at these pictures below.






This is in Pingjiang County, Hunan province, China. 

Hats off to these men, for their bravery and skill.


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Monday, 13 April 2015

The Road

~~~~
His day moved slow, 
Sweating in the harsh sun.
Hammering the rocks away,
His face, dark and ashen.

The friction of the pebbles,
Gives way to a road smooth.
His own life dull,
From happiness, a bit skewed.

Then came the moment to rest,
Deserved by everyone, in their nest.
But what about the birds in flight,
Where do they rest for the night?

The world zooms by,
His dreams, slow and still.
Life, for others, a smooth ride,
For him, a climb uphill.

After he had toiled hard, 
Built the bridges for the world.
Reminisced his universe small,
On his bed, The Road.
~~~~

His Bed The Road
His Bed The Road


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Monday, 6 April 2015

A Sweet Twilight

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The Church bells ring,
Signalling it's 8 o clock.
Time is moving too fast,
Ah, I am in a shock.

The "Goliath" world races ahead,
My "David" life is in a pause.
Unknown are it's reason,
Or is it my flaws?

Day to night, and night to day,
Black is soon turning grey.
Bridled hopes, this May,
For the time, they are a prey.

Wanderer of this lovely world,
My dreams are knotted and twirled.
All I want to is move ahead,
Dreams afloat, 'n wings spread.

Yet again, I am not in flight,
N the vision is not yet bright.
My destiny, before I write,
It is already a sweet twilight.

Once again, the setting sun, 
Colors the sky chrome 'n breathless.
Passing soon, without a fuss,
The temptress time, it's beauty ageless.
~~~~

A Sweet Twilight
A Sweet Twilight

P.S. Every evening, at 8 PM, I head the church bells ring, signalling the end of yet another day, with the sun setting on the horizon.

These are the thought which cross my mind, to the tune of the angelic Church bells.


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Thursday, 2 April 2015

Nature's Power

This is super typhoon Mayask, located in the Pacific - impacting Philippines and the neighboring countries.

Just have a look at the pictures taken by Samantha Cristoforetti from space.

Super Typhoon Mayask
Mayask

Super Typhoon Mayask
Mayask
She tweeted, 'Commands respect even from #space: we just flew over typhoon #Maysak'

Pictures like these leave me scared, and amazed by nature's power.

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Tuesday, 31 March 2015

Miss Bond

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A classy dame,
She set the snow aflame.
An ace of a chick,
No cliches, part of a clique.

A starlit girl,
A priceless pearl.
A deft dame,
Fame is her game.

A lady with an aura,
Unlike anyone, alpha.
A classy miss,
Reminisces me of bliss.

Who is this lassie,
A birdie free.
A lady from beyond,
She is Miss Bond.
~~~~

Candice Swanepoel Miss Bond
Miss Bond

P.S. This is for Bond, Miss Bond.

P.S.2. The next James Bond movie, Spectre, releases on 23 October 2015. For all Bond fans, stay hooked.

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