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Nullbyte
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Problem Solving Butler: April 2023
April 12PS 1PS 2
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can anyone please solve this

rather urgent
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Bunuel
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aayushimehta12
can anyone please solve this
This question is discussed here:
given-that-1-n-n-1-1-n-1-n-2-2-n-n-1-n-2-which-of-the-foll-423026.html
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aayushimehta12
this one too
Let rev in 2001 be y
2000 2001 2002
x. y z


Percentage increase from 2000 ->2001 = (y-x)/x
Percentage increase from 2001 ->2002 = (z-y)/y

According to question
(y-x)/x = (z-y)/y

solve for y
y^2-xy=xz-xy
=> y^2=xz
=> y = sqrt(xz)

Hope this helps
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^ this means exponent

just to verify
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can one also look into

this

according to my calculation

it is -1

sorry wrong question.
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Check

Multiply num and den by root 6 - root 2
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answer will be 3...
from a1 to a6 - if you’ll calculate using the formula given, it adds upto 0
so till 996 terms, sum will be 0
and then for the next 4 terms, it will add up to 3 (-1, 1, 2 and 1)
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ohhhh calculation mistake

thanks
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Bunuel
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If a man sells x oranges for a dollar, he loses 45 percent. By how much percentage should the man reduce his cost to make a profit of 10% on selling 2x oranges for a dollar.

A- 25%
B-50%
C-75%
D-150%
E-300%

OA is C

Can you explain ?
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Oh yeah 75%

Mb

Initial CP = (1/0.55x)=(20/11x)
Final CP =(1/1.1*2x)=(5/11x)
So difference =15/11x
That is 75% of initial CP
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How do I approach a question like this?
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Let’s assume 20 students name start with différents letters from A to T

We selected 3 out of 20 then reduce the different cases of 3 consecutives letters

C²⁰₃ =20!/3 !×17!=1140

Then let’s reduce how many case 3 names can be consecutive

6*3 =18
Hence 1140-18=1122

66
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Edoua
If a man sells x oranges for a dollar, he loses 45 percent. By how much percentage should the man reduce his cost to make a profit of 10% on selling 2x oranges for a dollar.

A- 25%
B-50%
C-75%
D-150%
E-300%

OA is C

Can you explain ?
­This question is discussed in detail here: 

https://gmatclub.com/forum/if-a-man-sel ... 22816.html
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Nullbyte
Initial CP = (1/0.55x)=(20/11x) Final CP =(1/1.1*2x)=(5/11x) So difference =15/11x That is 75% of initial CP
Please can you explain your reasoning ?

Bunuel
Thanks
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