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1. This alone is SUFFICIENT. d rounded to the nearest tenth must be 0.2 because h must be 4 or less. 2. This alone is SUFFICIENT. d rounded to the nearest tenth must be 0.2 because h must be 4 or less.

D

Last edited by topher on 15 Jul 2009, 07:20, edited 1 time in total.

If D<.25 then .2h6<.250 that is h cannot be greater than 5 so when rounding to tenth we will consider only h and since it is less than 5 so answer would be .2

Similarly, when h<5 ie it can be 4, 3, 2, 1 or 0 Same thing hold true here.. Ans D.

if digit h is the hundredths' digit in the decimal d=0.2h6,what is the value of d, rounded to the nearest tenth?

1) d<1/4 - d < 0.25. So d can be anything like 0.246, 0.236, 0.216, 0.226 0.206 etc etc....In any case, d rounded to the nearest tenth will always be 0.2. SUFFICIENT

2)h<5 This again confirms that d rounded to nearesr tenth can only be 0.2

d<0.25 if it is 0.246, rounded to the tenth is 0.3 (0.25 rounded to hundredth)

vs

Quote:

d<1/4 - d < 0.25. So d can be anything like 0.246, 0.236, 0.216, 0.226 0.206 etc etc....In any case, d rounded to the nearest tenth will always be 0.2. SUFFICIENT

I personally go with first quote, because for me 0.246 should be 0.3. because I start from right 0.246 --> 0.25 --> 0.3

but looks like gmat has its own convention. If some one could explain this ,it will be of great help !