vinnik wrote:

Thanks for your explanation

Regards

Vinni

rakeshd347 wrote:

Hi Vinni

It is very easy just a small trick that GMAT test you on your ability to think…..there are 6 digits if you multiply them both just by counting the digits on the right hand side of decimal of each number than it comes out to be 7 and you would have choose 7 right….but here is the trick if you see such an easy question in GMAT as yourself again there must be some catch in it and the catch here is that one of the number involves 5 in the end (95.75) and other number involves even number in the end which is 4(.02554). So when you multiply 5 and 4 there will be a zero in the end and there is no point showing the zero in the end of a decimal.

If you didn't understand let me choose a simple example.

Multiple 0.5 with 0.7 how many digits will be there in the multiplication after the decimal….obviously 2 because one number involves 5 but other doesn't involve even number.

Multiply 0.5 with 0.2 how many digits will be there in the multiplication after the decimal….now you will say 2 again its wrong because 0.1 and 0.10 is same so there is only 1 digit. So the right answer would be 1.

So whenever you have a 5 involved in the end of a number and even number at the end of the other number then number of digits will be less by 1 from original.

Please KUDOS me if this helps explain better.

I would like to add there that if the last two digits are divisible by 4, then the number of digits would be less by 2 from the original.

Had it been product of

95.75 and .02564 = 24.5503

OR

95.75 and .02544 = 24.3588

Same test applies on both the numbers. 75 is a multiple of 25 & 64 is multiple of 4; so resultant product will always give 100 (2 zero's at the end)

We require to focus on last 2 digits of both numbers to have a airtight answer

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