Who can find an answer different than 7.

A little calculator to help you try different numbers

http://www.blocklayer.com/jow104-7.htm


.

Quote:

---

Originally Posted by jow104

Ivan,that is a bit like ious.

And I cant seem to grip it in my hand:) (the minus bits)

---

Well!!
What have you got in your Hand:oo::no::doh:

And what have you got in you head?.........:wink::rolleyes:

Sorry...couldn't resist,
though shouldn't have.

I find maths Interesting and somewhat easyISH:2tsup:

Blocklayer, that was a good post and link.
Tell us please how you made that calculator.

Ivan, I was thinking along the lines of the Dimbleby science lectures that the British BBC does at Xmas time, they do practical/physical illustrations.

Thank you BlockLayer,
You saved my Hide.

Nice find:2tsup:

Ta.
Ivan

Quote:

---

Originally Posted by jow104

Blocklayer, that was a good post and link.
Tell us please how you made that calculator.

---

I just typed it up in notepad when I saw your post.
Its not that difficult.
Just view the source of the page and it should be pretty evident how it works

What's so special with -10?:?

Quote:

---

Originally Posted by Wongo

What's so special with -10?:?

---

its ten less than zero:?

I use to be good at maths. Now my brain hurts.:doh:

I am all confused but I have just returned home from the pub. -10 still gives a result of 7.

Think of a number.............. -10

Add Ten.................. -10 + 10 = 0

Double the result............. 0 x 0 = 0

Subtract 6................ 0 -6 = -6

Divide by 2.................... -6 / 2 = -3

Take away the first number you thought of......... -3 -(-10) = 7


Why is minus 10 special, the answer is still 7 :?

Mind you, try it with pi :D

Quote:

---

Originally Posted by Wongo

What's so special with -10?:?

---

Quote:

---

Originally Posted by switt775

Simple. Make a mistake. (but only 1. If you make 2 mistakes, they might cancel each other out, and you'll accidently get the correct answer.)

---

:doh:

pi , well done, no doubling a never ending decimial , though the -10 got a few :D:D

Quote:

---

Originally Posted by jow104

i.e. how can you lay down minus ten pieces and then carry on the clculation?

---

Think of a thermometer with plus degrees and minus degrees, or a uni some degrees are a plus and some arn't :doh:

Quote:

---

Originally Posted by Ashore

pi , well done, no doubling a never ending decimial

---

Oh? 2 x 1/3 = 2/3 or, in decimal, 2 x 0.333... = 0.666... no problems there apart from writing them out in full.

Come to that, every real number can be expressed as a "never-ending" decimal. eg. 1 is more accurately expressed as 1.000... and you have no problems doubling that, do you? :U

Quote:

---

though the -10 got a few :D:D

---

:p

Quote:

---

Originally Posted by Ashore

Think of a thermometer with plus degrees and minus degrees, or a uni some degrees are a plus and some arn't :doh:

---

Unsatisfactory solution. I want to see it in the real.:)

John,

Perhaps if you consider the planet earth (proper way up). Imagine the Equator is zero and everything North of it as negative, everything South as positive.

Are you real only when you are in Australia?:U

Quote:

---

Originally Posted by jow104

Unsatisfactory solution. I want to see it in the real.:)

---

Well if 10 people go to Uni in england and get an Engineering Degree thats a plus , but if 10 go and get an Arts Degree with a major in flower pressing, then thats a minus (as well as to thier parents bank account and a loss of 4-5 years of their life,) yeah well if your a bloke you could proberly still play for england but its still a minus:D:D:D

Love Australia, only the UK beats it.:)

Yeah but what about all the Poms over there?:wink:

Ooooooooooo........ :D

Quote:

---

Originally Posted by Cliff Rogers

Ooooooooooo........ :D

---

Hey! A different answer than 7.:2tsup:

Why wouldn't Pi work?

Of course it works.

Pi / 2 is a endless decimal.

BUT

(Pi / 2) * 2 = Pi and that is algebra.

Ivan’s post shows it doesn't matter what x (including pi) is , you will get

x + 7 – x = 7

This question works for real numbers, imaginary numbers, rational numbers, irrational numbers, whole numbers or decimals.

:sleep1: Let us know when you've finished Wongo. :D

A certain number consisting of sevens is divisible by 199.

Find the last 4 figures of the quotient without finding the whole quotient.....

In case you've got nothing better to do

Greg

6823

Well I do have something else to do but these matters need to be dealt with first. :D

Wongo.would you please do that computation using chinese graphics in algerbra and display, so we know that your calculations have been properly construed.

Let the last 4 digits be ABCD

So 7777…..77777 = …..ABCD * 199

Let just focus on the ABCD * 199 bit

ABCD * 199 =

A*100000 + B*10000 + C*1000 + D*100 + 0 + 0
+
9*A*10000 + 9*B*1000 + 9*C*100 + 9*D*10 + 0
+
9*A*1000 + 9*B*100 + 9*C*10 + 9*D
Now working from the last digit

D = 3 because 9 * 3 = 27 (carry 2 to the next digit)
C = 2 because 2 + 9 * 3 + 9 * 2 = 47 (carry 4 to the next digit)
B = 8 because 4 + 3 + 9 * 2 + 9 * 8 = 97 (carry 9 to the next digit)
A = 6 because 9 + 2 + 9 * 8 + 9 * 6 = 137 Bingo

Sorry this is the best I could do using a keyboard explain a maths problem.

Try 6823 * 199 and see what happens.

That should help you have a good nights sleep.:)

Quote:

---

Originally Posted by Greg Ward

A certain number consisting of sevens is divisible by 199. do you mean only the number 7 several times or series of the first 7 numbers or numbers that add up to seven indivudally, and any number is devisible by 199 eg 7 divided by 199 = 0.0351758 so are we talking whole numbers only like 4623 :?

---

Rgds

The number is a series of '7's, no decimals (although that may not affect the outcome in any event...... iI'm not sure)

Now Wongo has the answer for the last 4 digits..... how may '7's in the number itself? (I don't know the answer here and excel won't go past 777777777777777)

Greg

Greg, unless you give me a piece of Maple for free, I wont continue this question. :D

Wongo,
Doesn't the free maple you got yesterday count?

Tell you what. You want a challenge???

Whoever solves the (non-mathematical) answer to my quiz question regarding the use of the all 26 letters of the alphabet to make up 13 x 7 letter words from the 13 x 5 letter words listed deserves timber to the value of $100 (and that about covers your deador......)

Is that OK with you????
Regards

Greg

Quote:

---

Originally Posted by Greg Ward

Now Wongo has the answer for the last 4 digits..... how may '7's in the number itself? (I don't know the answer here and excel won't go past 777777777777777)

Greg

---

Greg, it will be extremely difficult to find out the answer. It will be a very long number. However, I think by using the Remainder Theorem very cleverly, the answer can be found. Still it will take a while.

So the answer exists but it is hard to work out.:doh:

Yeah, I know, I though you may have a Cray or perhaps a crayfish that may be able to give the answer...

Let's not worry about it. It was a good question and well answered.... it fitted into the 'sevens' area well.

Regards
Greg

Actually I do have the answer and it is

77777777777777777777777777777777777777777777777777777777777777

Now prove me wrong. :D


Wongo (100% in Higher Mathematics 1991 :U)



And the bit of free timber you gave me yesterday wasn't Maple. :D

You need to work on the alphabet word challenge under 'vowel' in the Quiz section to get your freebies.

Maths is obviously too easy for you, we need to get you off the straight and narrow.

7x62 times is really only small number (in relation to many primes and is obviously not a prime in any event.....just give me a little time to divide by 199.... I know the last four digits, but the rest by long hand division will take an hour or so.

Greg

OK I've got it.

it is 99 sevens.:2tsup:

I am dead serious.:;

The next one is 198 sevens

Then 297 sevens

Then 396 sevens

Then 495 sevens

God is great. :D

Nobody can check you in any event....

You are right, this does deserve some free maple, do you want the Canadian or US syrup?

Greg

It will try to explan when I have time. Anyone interested?:D