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w x .X c x ... _____ In the above mutiplication of the two

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w x .X c x ... _____ In the above mutiplication of the two [#permalink]

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New post 10 Aug 2009, 11:14
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0% (00:00) correct 100% (02:43) wrong based on 2 sessions

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w x

.X c x
... _____



In the above mutiplication of the two digit numbers wx and cx, where w,x and c are unique non-zero digits, the product is a three digit number. What is w+c-x?

(1) The three digits of the product are all the same and different from w c and x.
(2) x and w+c are odd numbers.

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Re: What is w+c-x? [#permalink]

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New post 10 Aug 2009, 13:45
Is it A?

Let say numbers be 10w+x and 10c+x

so after mutlpying we can have 100wc+10(w+c)x+x^2

Now since it 3 digit number so wc can be equal to less than 9.

wc can be if each digit is 3 and 3. against the question stem.

Other possibilities are (2, 3) and (2,4). (2,3) will fit the bill when x=4

With all these number 3 digit number will be 666.

so answer will be 1.

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Re: What is w+c-x?   [#permalink] 10 Aug 2009, 13:45
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w x .X c x ... _____ In the above mutiplication of the two

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