Finding the right answer to a GMAT problem is hard enough, but the GMAT makers include trap wrong answers as well. This how-to video will show you tricks for eliminating wrong answers and finding correct ones on algebra, roman numeral, and percent problems, and how to avoid common traps.

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on the marbles question, where does it say that the other 4 bags cannot have one marble?

on the discount question,,, Am i the only dummy that didnt get it and added 25 and 10 to get 35%?

@AniruddhaNatekar It says :"no two of the remaining bags are to contain an equal number of marbles"…

nii äge!

mn=500, m can be n and n can be m, choice d is just the same as e. how come d is the right answer?

yeah, it's somehow ridiculous..

All too easy

I am really depressed! I did wrong ALL the questions!! I am never gonna make it :(

Добавьте субтитры на русском ;-)

it means if m is DEFINITELY this, then n is.

damn, picked 10 for the last one, damn trappers…

this is so easy I don't think they'll give us sometihng like this…

Yes

This is how we Americans learn and teach in shcools and colleges……USA rocks…

i had the same thought, guess thats what math is like in the stats =)

If m is even – like 4 and n is odd like 125 then choice E should be possible correct?

e) if m is even, then n can be odd OR even (m=20 n=25, or m=10 n=50)

d) if m is odd, then n is always even (m=5 n=100, m=25 n=20….)

Both D/E are correct. :P

D cant be right because x has to be even and y has to be odd.

nevermind

m and n are given to be integers such that mn=500. If someone can't see how m and n can be used interchangeably, then 'nevermind' indeed. 😛

Now say m is 4 (even), which will make n 125(odd). That is the option e.

you should read option E as:" Given that m is even, n must be odd." not "Try to come up with an example where m is even and n is odd."

Odd * Even = Even (e.g. 5 * 100 = 500)

500 is even, so statement D must be true.

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Answer to 2nd question is none of the option as they forgot to mention 10*50=500 so option d cannot be the right answer nor option e

Hello all! i solved the successive discounted problem. Since there is no price given, you will have to enter any value. For example, i took a price of $200. Then you need to apply the first discount 10% which is 200*0.10 which is = 200-20 = 180; then you need to do same with the second discount but with the new price 180*0.25 which is 180 – 45 = 135. To find total discount now you need to take 135/200 = 0.675 or 67.5! now subtract 100 – 67.5 = 32.5. I hope this helps!

Why she chose D? Both D and E are valid statements.

and what if I take 2 and 1?

if i chose 1 as an odd number.. would i considered wrong?