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Old 27th January 2010, 18:44   #121
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Quote:
Originally Posted by Forged_Piston View Post
here are a few more..
....
1) Man overboard
2) I understand
3) Reading between the lines
4) Cross roads
5) Tri-cycle
6) 2 degrees below "0"
7) Neon Light?
8) 6 feet under ground
9) He's all by himself
10) Backward Glance
11) Life after death
12) (Missed this one)
13) (Missed this also)

Last edited by sudharma : 27th January 2010 at 18:46.
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Old 27th January 2010, 19:59   #122
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here are a few more..

...12. THINK...
Thinkin' (Think in) Cap?
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Old 29th April 2011, 23:31   #123
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Default Re: The Riddle & Puzzle Thread

Guys, a simple question.

What is 6 2 (1+2) = ?

I am getting the answer as 9, but some people are arguing that it should be 1. What's your answer?
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Old 29th April 2011, 23:53   #124
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Default Re: The Riddle & Puzzle Thread

Saw this thread after a long time,
12 is Think Big
Answer to 13 (oh I love this one) -> Long time no C

At Prateek, you can either of 9 or 1 depending on how you are prioritizing the operations. If I'm not wrong, mathematically brackets and additions will have higher priority for operation if I'm not wrong. So in that case it should be 1. 6/2(1+2) = 6/2x3 = 6/6 = 1
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Old 30th April 2011, 00:06   #125
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Default Re: The Riddle & Puzzle Thread

What I think is,

in 6 2 (1+2), it's 6/2 * (1+2) = 9

If the answer should have been 1, then it should have been 6 [2(1+2)] = 1.

In PEDMAS, doesn't divison have higher priority than multiplication?

There is a big discussion about this on Facebook: http://www.facebook.com/home.php?sk=...538&qa_ref=qts

Last edited by prateekm : 30th April 2011 at 00:14.
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Old 30th April 2011, 07:29   #126
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Default Re: The Riddle & Puzzle Thread

The rule i learnt in school was BODMAS - probably the same as PEDMAS.. . Yes - division does have higher priority than multiplication.
So, the answer should be 6, but i guess it just depends on who all use the BODMAS/PEDMAS rule..
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Old 30th April 2011, 22:14   #127
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by kaushik_s View Post
12 is Think Big
Answer to 13 (oh I love this one) -> Long time no C
You beat me to it. Grr...

Rebus are my fav type of puzzles. Here's another.

-----------------------------
1:30 IST
2:30 IST
3:30 IST
4:30 IST
-----------------------------

(The dashed lines are not a part of the question.)
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Old 2nd May 2011, 06:13   #128
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Default Re: The Riddle & Puzzle Thread

Four Times ?
.................................................. ..
Quote:
Originally Posted by anku94 View Post
1:30 IST
2:30 IST
3:30 IST
4:30 IST
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Old 2nd May 2011, 08:28   #129
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Default Re: The Riddle & Puzzle Thread

No. I have to admit, it's pretty hard to get this one, but looks ridiculously simple when you read it.

I'll post the answer today evening, if no one else gets it.
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Old 2nd May 2011, 09:51   #130
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by prateekm View Post
Guys, a simple question.

What is 6 2 (1+2) = ?

I am getting the answer as 9, but some people are arguing that it should be 1. What's your answer?

Its 1. Do the brackets first, multiply by 2. Then the division. So, (1+2)=3. 3*2=6 and 6/6=1.
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Old 2nd May 2011, 11:34   #131
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by prateekm View Post

What is 6 2 (1+2) = ?
Lets get rid of the brackets, then the expression is "6 2 * 3". And according to my knowledge and Wikipedia, division and multiplication are equal precedence. They should be performed in the order in which they appear. So, the expression is "(6 2) * 3", which is 9.
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Old 2nd May 2011, 20:25   #132
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by anku94 View Post
You beat me to it. Grr...

Rebus are my fav type of puzzles. Here's another.

-----------------------------
1:30 IST
2:30 IST
3:30 IST
4:30 IST
-----------------------------

(The dashed lines are not a part of the question.)
The answer is The Times Of India.
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Old 13th July 2012, 21:27   #133
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Default Re: The Riddle & Puzzle Thread

Found these two puzzles while aimlessly surfing. The first one is a proper math problem, while the second one is more of a riddle:

1. Pairs of primes separated by a single number are called prime pairs. Examples are 17 and 19, 41 and 43 etc.. Prove that the number between a prime pair is always divisible by 6

2. A dragon and knight live on an island. This island has seven poisoned wells, numbered 1 to 7. If you drink from a well, you can only save yourself by drinking from a higher numbered well. Well 7 is located at the top of a high mountain, so only the dragon can reach it.

One day they decide that the island isn't big enough for the two of them, and they have a duel. Each of them brings a glass of water to the duel, they exchange glasses, and drink. After the duel, the knight lives and the dragon dies.

Why did the knight live? Why did the dragon die?
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Old 16th July 2012, 11:56   #134
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by shamik.bose View Post

1. Pairs of primes separated by a single number are called prime pairs. Examples are 17 and 19, 41 and 43 etc.. Prove that the number between a prime pair is always divisible by 6

2. A dragon and knight live on an island. This island has seven poisoned wells, numbered 1 to 7. If you drink from a well, you can only save yourself by drinking from a higher numbered well. Well 7 is located at the top of a high mountain, so only the dragon can reach it.

One day they decide that the island isn't big enough for the two of them, and they have a duel. Each of them brings a glass of water to the duel, they exchange glasses, and drink. After the duel, the knight lives and the dragon dies.

Why did the knight live? Why did the dragon die?
1. Not sure of Mathematical proof's but yes all the numbers between the Prime pairs are divisible by 6 except for the pair (3,5).

2. The Knight survives as he drinks water from the Well 7 brought by the Dragon and the Dragon dies as it could have water only from Well 6 and not beyond.
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Old 16th July 2012, 13:00   #135
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Default Re: The Riddle & Puzzle Thread

Quote:
Originally Posted by shamik.bose View Post
Found these two puzzles while aimlessly surfing. The first one is a proper math problem, while the second one is more of a riddle:

1. Pairs of primes separated by a single number are called prime pairs. Examples are 17 and 19, 41 and 43 etc.. Prove that the number between a prime pair is always divisible by 6
Since any group of 2 or more consecutive numbers must have at least one even number, the number between a prime pair has to be divisible by 2 since it is even. Also, at least 1 number in a group of 3 has to be divisible by 3, and since the other 2 are prime, it has to be the one in the middle of the prime pair. Ergo, it is divisible by 6 (being divisible by both factors of 6)

Quote:
Originally Posted by shamik.bose View Post
2. A dragon and knight live on an island. This island has seven poisoned wells, numbered 1 to 7. If you drink from a well, you can only save yourself by drinking from a higher numbered well. Well 7 is located at the top of a high mountain, so only the dragon can reach it.

One day they decide that the island isn't big enough for the two of them, and they have a duel. Each of them brings a glass of water to the duel, they exchange glasses, and drink. After the duel, the knight lives and the dragon dies.

Why did the knight live? Why did the dragon die?
I thought about this and came up with some possible answers, but didn't arrive at an answer that is foolproof, i.e. one that would work 100% (with no possibility of any other option) assuming both the dragon and knight are perfectly rational and selfish beings. I then looked up the net to see if there were any such solutions, but looking at the supposedly correct solutions online as well, I didn't see any solutions that would not leave things to chance. The conjecture in the puzzle seems to have left some statements unspecified, and all the solutions assume some conditions over and above what is stated in the puzzle. I'm not sure it is correct to assume those conditions as de facto.

If anyone knows any solution that is foolproof, I would appreciate if you could share it, either here or via PM.

Last edited by sidkun : 16th July 2012 at 13:01.
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