2006-12-02 12:09:20 · 12 answers · asked by Roy 3 in Science & Mathematics ➔ Mathematics
As you can see by the comments, this is good, but it can be worked out with a little thought:-
Hold on I think I am picking up a signal from your mind, lets see if I am really picking up your signal, or if it is just my imagination going wild:
On a piece of paper write down the year you were born.
I think I know that year, I might be wrong.....
Add to that year, the year in which an important event happened.
That event just came to my minds eye, or was it just a dream?
Add to that your age at your birthday this year.
Oh I didn't expect you to be that young, it was an old trick you put down, you can't be this young.
Now add the number of years since the important event.
I think I know the total, It's..... well what do you make it?
No, I didn't think of that number.
I couldn't have been imagining that important event.
I can't have known how old, or young you are.
It must have been my imagination, I wasn't thinking of the number 4,012.
2006-12-02 12:55:23 · answer #1 · answered by Sprinkle 5 · 0⤊ 0⤋
6 times 2=12+30=42divided by 2=21-6=15
2006-12-02 12:42:55 · answer #2 · answered by jim_beam3001 3 · 0⤊ 0⤋
It will work with any number if it is done correctly.
Kamel H must have done it wrong.
.5 doubled =1
Add 30 = 31
Divide by 2 =15.5
minus number you first thought of .5 = 15
Zapp Branagan's example does work, but if he did it on a calculator with less than 14 digits it will be unable to give an accurate result.
17.577447800111 X2 = 35154895600222 divide by 2 it equals 17.577447800111
Negatives are more complicated, but they are not numbers in that sense.
2006-12-02 23:53:22 · answer #3 · answered by FairyBlessed 4 · 1⤊ 0⤋
You've just proved
((2x + 30)/2) - x = 15
Which works for all values x
((2x + 30)/2) - x = 15
(x + 15) - x = 15
15 = 15
2006-12-02 12:12:20 · answer #4 · answered by sep_n 3 · 3⤊ 0⤋
But only because effectively you're only dividing 30 by 2
2006-12-02 12:11:17 · answer #5 · answered by LEE B 1 · 2⤊ 0⤋
thats easy were jus halving the 30 at the end. if you had said 10 the answer would have been 5
2006-12-02 12:11:46 · answer #6 · answered by Whitey 2 · 0⤊ 1⤋
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2016-12-29 19:44:53 · answer #7 · answered by para 3 · 0⤊ 0⤋
Oldie but goodie
2006-12-02 12:11:20 · answer #8 · answered by Scotty 7 · 0⤊ 1⤋
Just learnt that one in the pub have you?
2006-12-02 12:16:19 · answer #9 · answered by Anonymous · 0⤊ 0⤋
i didnt get that answer although i started with 0.5
2006-12-02 22:33:57 · answer #10 · answered by Twista-Adzy 2 · 0⤊ 2⤋