Another Riddle

[Night Train]

Whats the only place on Earth where Friday comes before Thursday?

[morinput]

The Dictionary?

[Night Train]

A winner! (already!)

[Sean]

Night Train,
Ok i was dumb enough to ask this the last time(guess i didn't learn the last time around).What else you got? :hammer:

[Joann Raytar]

Believe it or not but 8.02pm on February 20 this year was an historic moment in time.

It was not be marked by the chiming of any clocks or the ringing of bells, but at that precise time, on that specific date, something happened which has not occurred for 1,001 years and will never happen again.

What is the significance of that time yesterday?

[Sean]

They both would be displayed as 2002. :bbg:

[Jackie L]

Hi Jo,

Cool Topic. Yup, yesterday at 20:02 on 02 20 in the year 2002.

200202202002

If you reverse it

200202202002

it remains the same

: )

[ioconnell]

why is the month first in the states,

Here it read

200220022002

[Night Train]

Originally posted by Sean
Night Train,
Ok i was dumb enough to ask this the last time(guess i didn't learn the last time around).What else you got? :hammer:

OK, You asked for it!:D :bbg: :shiner:

One hot Monday summer day, Ol' Zeke Brown and I was a-sitting on the front porch of his farmhouse talking things over. We noticed a rather large flock of crows had settled on the telephone lines out near the dusty road. "I'll be darned!" said Zeke."I bet there must be a million of them critters out there."
"Well, now Zeke," I replied. "A million's a pretty big number, y'know. I'd reckon it's more like a thousand, myself." (Zeke's and my 'rithmetic skills weren't too good, seeing as how we never got past the 3rd grade.)

But just then Ruben, Zeke's 10-year-old grandson, who is in the 6th grade, spoke up saying, "You're both wrong. I'll count them." Which he did in just about a couple of minutes. But as he finished counting, a tractor passed by making a lot of noise, and it scared away some crows.

"Boy, that was interesting," the lad said. "That tractor just scared away exactly ten percent of the crows that were on those lines!"

Since neither Zeke nor I understand percents, we remained respectfully quiet, accepting what the boy said.

A few moments later some crows returned to the lines; Ruben observed: "Now the number of crows that have returned is 10% of the number that did not fly away the other time. That's even more interesting."

Of course Zeke and I nodded our heads in complete agreement. Who were we to doubt a 6th grader?

The next day the crow story continued. This time Zeke and I didn't attempt any guessing, allowing Ruben to take over the show. "Wow! These certainly are mathematical crows. Now there are 10% more sitting there than started out yesterday," the youth commented. (You could just see the pride in Zeke's eyes as he listened to the wisdom of his grandkid.)

At that very moment, a loud clap of thunder was heard in the sky, scaring away some of the crows. Ruben said, "It's amazing, really amazing. Just 10% of those crows were scared enough to leave."

A thought came to my mind. After all the coming and going of the birds, I wondered on which day were there more crows left sitting on the lines -- Monday or Tuesday? I thought it was Tuesday, since on Tuesday there were more birds to start with. But when I asked Zeke's opinion, he said it must have been Monday, because birds returned that time.

But Ruben showed how important higher education is when he confidently announced, "There were the same number of crows left on the lines each day!" Then, being bored with such easy math, he dashed away to play games with his older brothers, leaving us to wonder why the number of crows did not change.

Sean, can you help Ol' Zeke and me to understand? We'd shore appreciate it.

[HINT: This means, there's no single number, short answer this time, but rather only an explanation of the logic behind what Ruben said.

Bonus: If we consider this as a real-life problem, how many crows were probably left on the lines on each of those two days?

[Jackie L]

Ok, Night Train, I think I have the logic and the correct number in my head (and now on a piece of scrap paper). Would Sean like to guess by 08:00 tomorrow morning?

[Sean]

Jackie L,
What did you come up with? You don't have to wait for me.............as i've seen the post this AM:)
Go for it!

[Jackie L]

Ok, here is how I see it...

On Monday there were 100 crows on the telephone line. The tractor scared away 10% of them. That leaves 90 crows.

So, when 10% of the those that did not leave (9) came back, that left 99 crows on the telephone line on Monday.

On Tuesday there were 10% more on the line than started out the day before. So add 10 more crows to 100.

So to continue, 110 crows just minding their own business when a clap of thunder scared off 10% of them. That leaves 99.

The most important question is...who is buying the beer?

[MVEYES]

Two boll weevils grew up in South Carolina. One went to Hollywood and
became a famous actor. The other stayed behind in the cotton fields and
never amounted to much. The second one, naturally, became known as the
lesser of two weevils.


Just thought I would throw that in.



:bbg: :bbg: :bbg: Jerry

[Night Train]

99 is correct:
To do this we have to prove that based on Ruben's observations therewere in fact the same number of crows to start with on both Mondayand Tuesday. Start by examining monday first and then comparing it to Tuesday.

Monday:

let the number of crows to begin with on Monday = X

When the tractor goes by and scares some of the crows away, Ruben says:
"That tractor just scared away exactly ten percent of the crows that were on those lines!"

So the number of crows left after the tractor goes by = (X - (1/10)X)

Next when some of the crows return, Ruben says, "Now the number of crows that have returned is 10% of the number that did not fly away the other time.

So the number of crows that have returned =

(1 / 10)( X - (1 / 10)X)

= (1 / 10)X - (1 / 100)X
= (10 / 100)X -(1 / 100)X = (9 / 100)X

To find the final number of crows in the end, we take the number of crows that are left after the tractor scares 10% away and add that to the number of returning crows:

= (X - (1 / 10) X) + (9 / 100)X

= (100 / 100)X - (10 / 100)X + (9 / 100)X = (99 / 100)X

So the number of crows left on the line at the end of Monday is:

(99/100) times however crows there were to begin with = (99 / 100)X


Tuesday:

In order to find out how many crows that are left at the end of
Tuesday, we start with the first piece of information that Ruben
gives us:

"Now there are 10% more(crows)sitting there than started out
yesterday,"

We have already let the number of crows to start on Monday = X, so the number of crows to start on tuesday is:

(1 / 10)X + X

Next, when thunder claps Ruben says: "It's amazing, really amazing.
Just 10% of those crows were scared enough to leave."

So the the number of crows left after the thunder claps is:

(1 /10)X + X - (1 / 10)((1 /1 0)X + X)

= (1 / 10)X + X - (1 / 100)X -(1 / 10)X

= (10 / 100)X + (100 / 100)X -(1 / 100)X - (10 / 100)X

= (99 / 100)X, or (99 / 100) times the number of crows to start with on Monday.

So as we see, the number of crows at the end of Monday is exactly thesame as the number of crows at the end of Tuesday.

Bonus:

Taking in to account that this is a real-life problem, it would be a
fair estimate that there were 99 crows left on the lines on both
Monday and Tuesday. In Order for this to be true, it would mean thatthere were 100 crows to begin with on Monday and 110 crows to beginwith on Tuesday.

If we plug these numbers back into the equation, we can see this tobe true:

Monday: 100 - (1 / 10)(100) = 90 (left after tractor goes by)

(1 / 10)90 = 9 (return to lines)

9 + 90 = 99 crows left

Tuesday: 100 + (1 / 10)(100) = 110 to start on Tuesday

(1 / 10)110 = 11 are scared away by thunder

110 - 11 = 99 crows left on Tuesday

[Sean]

Way To Go!!........Jackie L.

[ioconnell]

At local village gala, the entire population turned out, 500 people. The event raised $3000.

Tickets were priced as follows:


$7.48 men
$7.12 women
$0.45 Children

How many children were there?

[MVEYES]

Dead Donkey

It was early one morning when a pastor heard a noise outside his door. When
he opened it, he found a donkey, which immediately fell over dead. Not
exactly knowing what to do about the situation, he called the local sheriff
and told him about what was lying before him. The sheriff couldn't resist
jabbing at the minister and said, "Pastor, I thought the first duty of the
minister was to bury the dead." Without hesitation, the pastor said, "No,
the first duty of the minister is to notify the next of kin."


:D :bbg: :D :bbg: Jerry