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Quick: What is 11 * 530901






11 * 530901
5839911
100%
 100%  [ 4 ]
3468540
0%
 0%  [ 0 ]
5839912
0%
 0%  [ 0 ]
> Answer Choices given
0%
 0%  [ 0 ]
< Answer Choices Given
0%
 0%  [ 0 ]
I'm not smarter than a Middle-school student. :(
0%
 0%  [ 0 ]
Total Votes : 4

Ircher
Answer in less than 2 minutes please. Oh yeah, pencil/paper AND calculators ARE NOT ALLOWED; only your mental cap.

Edit: Apparently, everyone is to dumb (not trying to be mean) to do this in his or her head, so I AM now letting you use paper and pencil if necessary.
CHAOS-THEORY
i hate maths; i dont think i ll be able to resolve it even with a calculator xDDDDDD i dont wanna think anyway.
_____________________________
wow nice then; i hope i ll be present that day (;
Ircher
CHAOS-THEORY wrote:
i hate maths; i dont think i ll be able to resolve it even with a calculator xDDDDDD i dont wanna think anyway.

Hey, I will teach you a cool 11's trick when the poll is over in a couple of days, okay? It works better with less digits, but I find it faster than doing the multiplication itself.
Bikerman
You mean the one where you sum the digits and put the sum in the middle?
Thus 24*11 = 2 (2+4=6) 4 = 264, 18*11 = 1 (1+8=9) 8 = 198 etc etc?
It is a useful shortcut.
Ircher
Bikerman wrote:
You mean the one where you sum the digits and put the sum in the middle?
Thus 24*11 = 2 (2+4=6) 4 = 264, 18*11 = 1 (1+8=9) 8 = 198 etc etc?
It is a useful shortcut.

That I believe is correct; why don't you vote for the poll?
Bikerman
Well, I think it's obvious that I know the answer and I'm not really a fan of polls where there is a factual answer because they tend to give the impression that opinion matters in such things whereas, of course, it doesn't.
Arrogant
5839911
Arrogant
when you do 11 * 530901, the last digit must be 1 and answer must be one of the options
So it must be a.
Peterssidan
The way I calculated it in my head was that I put the number on top of itself shifted one digit and just summed the digits in each column. The reason this works is because 11 * 530901 = 10 * 530901 + 530901
Code:
 5309010
+ 530901
--------
 5839911

It was as if the number had been chosen to make this calculation easy because all except one column contained 0.

Arrogant wrote:
when you do 11 * 530901, the last digit must be 1 and answer must be one of the options
So it must be a.

You have to calculate the whole number because it could have been > Answer Choices given or < Answer Choices Given.
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