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Quote:

You need hard questions in the test to improve accuracy of prediction and accuracy of measurement because if somebody takes a bunch of easy and medium questions you don’t really know their upper level so you need a good chunk of hard questions to get that determined. But you also need medium and easy in case the person is not scoring well to potentially determine their lower boundary and then the test tries to figure out and significantly reduce the upper and lower boundaries. This is Dunn through question picking and serving and at the very end. The test gives you a single score but in reality it’s kind of a range based on the certainty of the algorithm. On the gmat prep that range is supposed to be plus minus one on each of the sections and that’s what we’re aiming on gmat Club’s new algorithm as well.
Thank you BB for such a detailed insightful response regarding the algo and score range... but I have one out of curiosity question on top of this...
BB, As we are tweaking and doing hit and trial with our algo. then we should have any rough ball park estimate as target to achieve right ? I mean to say anything like if someone have 2 wrong question in Quant he would get a score of 84 to 86 or something of that sort in each section....
If this is correct then could you please give that detail what would be the pessimistic range of score on the basis of wrong answer in each section if that is possible...

PS - Yesterday, I have asked this question in our ofc hours call but unfortunately we are unable to conclude on this anything... we all feel GMAT algo is weird and its unpredictable to get this kind of range if you have any insights on this it would be highly valuable specially for DI section 😅
Thanks !
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Would it be sufficient to practice DI from gmat club or should i purchase additional mocks and have a see
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Would it be sufficient to practice DI from gmat club or should i purchase additional mocks and have a see
As far as I got to know, everyone suggested me to go for official DI questions and if all official questions are utilized then next option is Gmat Club DI questions and other 3rd party questions are not that much recommended for DI section. Thanks!
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If you make a mistake in the initial few questions then the penalty will be harsh?

Also, I saw a video mentioning that GMAC adds a few pilot questions to evaluate how the questions perform, and we are not scored on them. Based on that, the scoring can also be impacted.

Also how will be solve this question?

there-are-five-members-in-a-family-a-couple-and-their-three-children-306403.html
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the age of father mother and three childrens be f,m,a,b,c. Moreover a>b>c.
given that : F=3*(a+b) and F= b2+c2+11 .
The two statements standalone are not sufficient. F+m+a+b+c =105 and 40<M<F.
combining both we get, we find F is a multiple of 3 and greater than 40. List of 3k multiples which is greater than 40 are : 42, 45, 48, 51, 54, 57...... but there is a constraint of mother greater than 40. Extending beyond 40 we cannot accommodate the three children. If father is 57, the sum of the two children’s become 19. In worst case 57+41+19 exceeds 105. So, at exactly 48, we get 48+41+16 =105. We need to accomdate the third child. Now, we are left with two cases 45 = 3*15 and 42= 3*14. Using F=b2+c2+11. Let’s take sum of squares = 45-11 = 34. Can 34 be represented as sum of squares. 9+25. So, both combined is sufficient.

Amalgum23
the age of father mother and three childrens be f,m,a,b,c. Moreover a>b>c.
given that : F=3*(a+b) and F= b2+c2+11 .
The two statements standalone are not sufficient. F+m+a+b+c =105 and 40<M<F.
combining both we get, we find F is a multiple of 3 and greater than 40. List of 3k multiples which is greater than 40 are : 42, 45, 48, 51, 54, 57...... but there is a constraint of mother greater than 40. Extending beyond 40 we cannot accommodate the three children. If father is 57, the sum of the two children’s become 19. In worst case 57+41+19 exceeds 105. So, at exactly 48, we get 48+41+16 =105. We need to accomdate the third child. Now, we are left with two cases 45 = 3*15 and 42= 3*14. Using F=b2+c2+11. Let’s take sum of squares = 45-11 = 34. Can 34 be represented as sum of squares. 9+25.

So both statements together is sufficient. Nice question. Thanks for sharing
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Thank you, its in archived if the admins can remove it then it will be useful

Sharing once more PS question found it really interesting for everyone
the-hands-of-a-strange-clock-move-such-that-they-would-meet-twice-as-377062.html
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Quote:

Hmm, makes sense. Planning to work on my time management and drilling on Qs that I've been getting wrong consistently...
Hey have u attempted all of mba official mocks

I have an exam on thursday
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I've given all mocks except mock 5 & 6, so have 4 mocks remaining...
Ok good u can give those remaning mocks every 2 days
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1. Analyzing Statement (1)
"From any two snakes from Pandora’s box at least one is a viper."

This is the key piece of logic. If you had two or more cobras, it would be possible to pick a pair of snakes that contains no vipers (a cobra-cobra pair).

For the statement to hold true—that any pair you grab must contain at least one viper—there cannot be more than one snake that is not a viper. Since we know there is at least one cobra, there must be exactly one cobra.

If there were 0 cobras, it would contradict the premise. If there were 2 cobras, you could pick both of them and fail the "at least one viper" rule. Therefore, there is exactly 1 cobra.

2. Analyzing Statement (2)
"The total number of snakes in Pandora’s box is 99."
This gives us nothing about the division of Cobras and Vipers.
This statement gives us the scale of the box, but doesn’t change the logic from Statement 1. We now know that if there are 99 snakes total and only 1 of them is a cobra, then there are 98 vipers.
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