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Provided that 4*12=6 and 8*8=1. Find 5*6 A.1 B.2 C.3 [#permalink]
 21 Nov 2005, 03:48
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Provided that 4*12=6 and 8*8=1. Find 5*6
A.1
B.2
C.3
D.4
E.5
Please don't feel unreasonable right away. Take a close look 
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C. 3
a*b = c
c is the *signle digit sum* of product
4*6 = 24
2+4 = 6
8*8= 64
6+4=10
1+0=1
5*6=30
3+0 = 3
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Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)
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SVP
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good try but not the correct answer ..this problem uses some method which you're especially good at( I can tell from many of your posts) 
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SVP
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I am absolutely clueless..... lexi.. where did you get this 
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hey ya......
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laxieqv wrote: good try but not the correct answer ..this problem uses some method which you're especially good at( I can tell from many of your posts) as long as explanation satisfies all constraints and has no flaws, it has to be answer
unless question is ambiguous
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Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)
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Manager
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This is driving me nuts...please post the answer ASAP!
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SVP
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try more~! I'll post OE and OA after my class today ^_~ ...btw, don't forget about the reasonable/ conventional products..
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Director
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Is it A) 1 ?
Ofcourse, i don't want to  myself explaining how I came to this. This one should go in 'Fun Math' though apparently no one saw any fun in this...esp. stretchad!
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hik, this problem may be for fun maths or IQ test ..I'm sorry if it takes your precious time
OA is 2.
To find the answer, one needs to compare these weird products with their reasonable versions.
4*12= 48= 6 mod 7
4*12= 6 comes from the above reasoning
8*8= 64 = 1 mod 7
8*8=1 comes from the above reasoning
5*6= 30= 2 mod 7
---> 5*6= 2
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Director
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See...that's why I didn't want to explain 
My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post
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VP
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gsr wrote: See...that's why I didn't want to explain My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post qsr, let me talk to titleist to create those sadistic work problems for you when you are about to attend exec meeting tomorrow
by the way, good that i didnt try..don't think would have gone close to OA
good question laxieqv ...
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Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)
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gsr wrote: See...that's why I didn't want to explain My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post 3458^2389 = 30565492056345340534548605754645994343423355454353463423439964644545460753456343553472 
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Director
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laxieqv wrote: gsr wrote: See...that's why I didn't want to explain My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post 3458^2389 = 30565492056345340534548605754645994343423355454353463423439964644545460753456343553474 Do you have a supercomputer or something at the University? 
You both are Math 'Bombs'! Poor my fellow GMATTakers, because of guys like you, the 'harder' questions in the Q section will move to the 'easy Q's' bin. Very unfair  Glad that I took the exam before you too!
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Manager
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My husband got the answer this morning. Thanks for posting the answer!
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duttsit wrote: as long as explanation satisfies all constraints and has no flaws, it has to be answer unless question is ambiguous Explanation has flaws.  duttsit wrote: a*b = c
c is the *signle digit sum* of product
4*6 = 24
2+4 = 6
It was 4*12, not 4*6.
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Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.
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Current Student
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laxieqv wrote: gsr wrote: See...that's why I didn't want to explain My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post 3458^2389 = 30565492056345340534548605754645994343423355454353463423439964644545460753456343553472 Please show your work Laxie  
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SVP
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GMATT73 wrote: laxieqv wrote: gsr wrote: See...that's why I didn't want to explain My strategy for testing duttsit (and now including you) - I have posted in the GMAT forum under Titleist's post 3458^2389 = 30565492056345340534548605754645994343423355454353463423439964644545460753456343553472 Please show your work Laxie well, it's a top secret and my monopoly solution ( have to keep to defeat a supercomputer)
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close
