Million maths

doodinthemood
Posers and Puzzles 04 Oct '07 17:05
1. 04 Oct '07 17:05
You can add, multiply, divide or subtract by a number each turn.
You can use the numbers 1-9 inclusive but each only once.
You cannot use brackets.
You cannot get a fraction.
I.E if you wanted to divide by nine, you couldn't instantly. Your first moves would presumably be:
1,000,000 - 1 =
999,999 / 9 = 111,111

and then you can't use 1 or 9 from then on.
What's the lowest number you can get to?
2. sonhouse
Fast and Curious
04 Oct '07 17:55
Originally posted by doodinthemood
You can add, multiply, divide or subtract by a number each turn.
You can use the numbers 1-9 inclusive but each only once.
You cannot use brackets.
You cannot get a fraction.
I.E if you wanted to divide by nine, you couldn't instantly. Your first moves would presumably be:
1,000,000 - 1 =
999,999 / 9 = 111,111

and then you can't use 1 or 9 from then on.
What's the lowest number you can get to?
1E6 /5=200,000/8=25,000/4=6250/2=3125-(97631)=-94506
Thats lower than zero, pretty low!
3. wolfgang59
Mr. Wolf
04 Oct '07 18:14
915 1st attempt
139 2nd attempt
4. wolfgang59
Mr. Wolf
04 Oct '07 18:18
3rd attempt

Nnnnnnineteen

19!
5. 04 Oct '07 18:39
Also, no catanation!

I'd like to see your 19 wolfgang. Best I managed was 138
6. sonhouse
Fast and Curious
04 Oct '07 18:45
Originally posted by doodinthemood
Also, no catanation!

I'd like to see your 19 wolfgang. Best I managed was 138
minus 94thousand is a lot lower than 138!
7. wolfgang59
Mr. Wolf
04 Oct '07 18:541 edit
The problem was using the numbers 1-9 NOT the digits 1-9 as you did!!

Solution to 19

Its obvious to use factors of 1,000,000 first
divide by 8
divide by 4
divide by 2
divide by 5
that gives 3125

It would be nice to divide by 9 asap so

divide by 9 giving 348

LUCKILY thats divisible by 6

divide by 6 gives 58

We only have 1 and 3 left so

subtract 1 = 57

divide by 3 = 19

I hope I havent made any embarrassing mistake!! ðŸ˜‰
8. 04 Oct '07 18:58
That's very good ðŸ™‚ and looks fine. Impressive. I'd like to see if anyone can beat that.
9. AThousandYoung
04 Oct '07 19:221 edit
Originally posted by doodinthemood
You can add, multiply, divide or subtract by a number each turn.
You can use the numbers 1-9 inclusive but each only once.
You cannot use brackets.
You cannot get a fraction.
I.E if you wanted to divide by nine, you couldn't instantly. Your first moves would presumably be:
1,000,000 - 1 =
999,999 / 9 = 111,111

and then you can't use 1 or 9 from then on.
What's the lowest number you can get to?
1,000,000/9/8/7/6/5/4/3/2 - 1

Whatever that works out to be.

EDIT - 1.76
10. wolfgang59
Mr. Wolf
04 Oct '07 19:29
YOU CANNOT GET A FRACTION

"You cannot get a fraction.
I.E if you wanted to divide by nine, you couldn't instantly. Your first moves would presumably be:
1,000,000 - 1 =
999,999 / 9 = 111,111"
11. AThousandYoung
04 Oct '07 19:30
Originally posted by wolfgang59
YOU CANNOT GET A FRACTION

"You cannot get a fraction.
I.E if you wanted to divide by nine, you couldn't instantly. Your first moves would presumably be:
1,000,000 - 1 =
999,999 / 9 = 111,111"
Oh, sorry.
12. SwissGambit
Caninus Interruptus
05 Oct '07 05:171 edit
Originally posted by doodinthemood
That\\\'s very good ðŸ™‚ and looks fine. Impressive. I\\\'d like to see if anyone can beat that.
I think I just might be able to beat it.

1,000,000
/8 = 125000
/2 = 62500
-4 = 62496
/6 = 10416
/7 = 1488
/3 = 496
-1 = 495
/9 = 55
/5 = 11
13. TheMaster37
Kupikupopo!
05 Oct '07 08:39
Originally posted by sonhouse
1E6 /5=200,000/8=25,000/4=6250/2=3125-(97631)=-94506
Thats lower than zero, pretty low!
Though what you write is complete and utter nonsense. That is exactly what math teachers are trying to get OUT of the kids heads.
14. TheMaster37
Kupikupopo!
05 Oct '07 08:41
1,000,000 - 987,654,321 = - 986,654,321

I win.
15. sonhouse
Fast and Curious
05 Oct '07 13:472 edits
Originally posted by TheMaster37
Though what you write is complete and utter nonsense. That is exactly what math teachers are trying to get OUT of the kids heads.
Exactly how does that violate the requirements of the first post? A negative number is lower than zero in ANYONE's maths book. I can't help it if he defined the problem inexactly. If he wanted the series end to be exaclty zero he should have specified that. There was no such specification, therefore any negative number is a valid answer.
He specified, and I quote: "What is the lowest number you can get to?"
Hey, so I am lawyering up, that's what logic is all aboutðŸ™‚