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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 19:02
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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 19:54
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Anyone have a fast way to do these? < 120 seconds
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First one is B
Want to find Profit:
Profit = 20*(S-C)

(1) 2400 = 20*(2S-C)
2S-C = 120
If S=60 and C=0, then profit is 60 each.
If S=70 and C=20, then the profit is 50 each
INSUFFICIENT

(2) 20*((S+2)-C) = 440
S-C = 20
SUFFICIENT
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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 20:22
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bkk145
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Anyone have a fast way to do these? < 120 seconds

First one is B
Want to find Profit:
Profit = 20*(S-C)

(1) 2400 = 20*(2S-C)
2S-C = 120
If S=60 and C=0, then profit is 60 each.
If S=70 and C=20, then the profit is 50 each
INSUFFICIENT

(2) 20*((S+2)-C) = 440
S-C = 20
SUFFICIENT
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Agree...

- Brajesh
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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 20:31
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For 2nd Question:

ST1:

X(Y+5) is even

X and Y are positive

Let's say Y =1 (odd) then (Y+5) = 6 and to make X(Y+5) even , X can be odd or even.

So INSUFF

ST2:


6Y^2 + 41Y + 25 is an even integer.

6Y^2 will always be even for all + values of Y.

We have to make "41Y + 25" even so that whole equation will become even.

25 is an odd no.

ODD + ODD = EVEN

So Y has to be odd.

But is INSUFF.

Together, if Y is odd then Y+5 will be even so X can be Even or Odd.

So E.

- Brajesh
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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 22:48
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first Q: got B

cost of each coat = c
cost of 20 coats = 20c
selling price of each coat = s
selling price of 20 coats = 20s

gross profit, g = 20s-20c = 20(s-p)
so we need to find the value of s-p?

1: if sp = 2s
gross profit, g = 20(2s) - 20c = 2400
20(2s-p) = 2400
2s-p = 120

so nsf..

2: if sp = s+2, g = 440

20(s+2-p) =440
20s + 40 -20p = 440
20s 20p = 440 - 40
20(s-p) = 400

since g = 20(s-p) = 400, st. 2 is suff.

So B is OA.
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Anyone have a fast way to do these? < 120 seconds 04 Oct 2007, 22:52
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second: got E.

1: y is odd, so no matter the value of x, x(y+5) is even.
2: again y is odd. same as above.

so E.
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Anyone have a fast way to do these? < 120 seconds 05 Oct 2007, 15:02
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Second one is E

(1) x*(y+5) = even
This means x can be even or odd depending on y.
INSUFFICIENT

(2) 6y^2 + 41y + 25 can only be even when y is odd
INSUFFICIENT since it doesn't say anything about x

Together, INSUFFICIENT
x can be odd or even since y is odd.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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