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Ok I got one for ya, you MatheMagicians When positive

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Ok I got one for ya, you MatheMagicians When positive [#permalink] New post 11 Apr 2007, 13:14
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Ok I got one for ya, you MatheMagicians :magic

When positive integer x is divided by positive integer y, the remainder is 9. If x/y = 96.12, what is the value of y?

A. 96
B. 75
C. 48
D. 25
E. 12

Why does the OA say
B?
I get A
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 [#permalink] New post 11 Apr 2007, 14:01
The remainder is 0.12y=9 so 12y=900 ie, y=75
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 [#permalink] New post 11 Apr 2007, 15:07
Ahhh, that was a nice little spell kev :good
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 [#permalink] New post 11 Apr 2007, 20:48
Kinda late but yea...it's B.

x = ny + 9

x/y = 96.12

so .12 should be what you get when you divide 9 by y.

9/y = 12/100
900/12 = y
y = 75

:)
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 [#permalink] New post 12 Apr 2007, 06:10
The question says that x is an integer so

x/y = 96.12
or x = 96.12 * y

put the values given in the option. A C E cant give whole number with 96.12.

Try with 75 and 25 and one should arrive at the answer.

Some bit of mental multiplication would easily reveal that 25 also can be opted out.

Hence B
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 [#permalink] New post 12 Apr 2007, 07:25
May be we could deduce a formula for this kind of problems...

Remainder = Value after decimal * denominator (provided 'value after decimal > 0)

In our case
9=0.12*y=>y=75
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Re: PS: x/y..... More Remainder Fun [#permalink] New post 14 Apr 2007, 01:26
vikramjit_01 wrote:
Ok I got one for ya, you MatheMagicians :magic

When positive integer x is divided by positive integer y, the remainder is 9. If x/y = 96.12, what is the value of y?

A. 96
B. 75
C. 48
D. 25
E. 12

Why does the OA say
B?
I get A


x/y=96.12 and the remainder we get is 9 so .12y=9 therefore y=900/12 = 75. so answere is B.
Re: PS: x/y..... More Remainder Fun   [#permalink] 14 Apr 2007, 01:26
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