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1. ## Thread: Sum of integers

by Eternal
Replies
6
Views
955

### Re: Sum of integers

I'd be super careful with this one, and do it like this:

102, 105, ..., 198 (sum of digits must be a multiple of 3).

-99 from each

3, 6, 9, ..., 99

divide by 3
2. ## Thread: Reciprocal of Prime Numbers and Fraction - Difficult!!!

by Eternal
Replies
9
Views
2,875

### Re: Reciprocal of Prime Numbers and Fraction - Difficult!!!

1/p + 1/q = (p+q)/(pq)

Now p and q are two different primes, and so neither p nor q divides (p+q),
and hence (p+q)/(pq) is already in reduced form. So denominator has to
be a product of two...

by Eternal
Replies
3
Views
1,817

### Re: Number properties

105=3*5*7
3 divides x
7 divides y

Need 5 to divide x or y.

-Chris

by Eternal
Replies
8
Views
4,472

### Re: Decimals!

D=0.89C
U=1.07T

(D+U)/(C+T) = 1.01
0.89C+1.07T = 1.01C + 1.01T
0.06T = 0.12C
C/T = 1/2

-Chris

by Eternal
Replies
5
Views
906

### Re: Geometry problem

a^2 + b^2 = 40000
2a+2b=560

So

a+b=280
a^+2ab+b^2=280^2 = 40000+400*80+6400=78400

So
6. ## Thread: Maximum Quantitative Score (CAT)

by Eternal
Replies
1
Views
1,514

### Maximum Quantitative Score (CAT)

What's the maximum quantitative score you can get on the CAT version
of the GMAT? Is it the same regardless of when you take the CAT?
I'm hoping to get all of the quantitative questions right when...
7. ## Thread: Kaplan Quantitative Practice

by Eternal
Replies
0
Views
924

### Kaplan Quantitative Practice

Does anyone have any opinions regarding the practice test in Kaplan's
latest book? I took the quantitative practice test, scored 35/37 (two
sloppy errors :( ) for a scaled score of 51-52. Is that...
8. ## Thread: Hi, I need GMAT study materials ASP

by Eternal
Replies
2
Views
895

### Re: Hi, I need GMAT study materials ASP

Thanks for the tips! I'd like to get a 750+ on the GMAT, but I realize
that even for good test takers the range 720-800 can be iffy (you're
liable to wind up anywhere within that range).

-Chris
9. ## Thread: Hi, I need GMAT study materials ASP

by Eternal
Replies
2
Views
895

### Hi, I need GMAT study materials ASP

If anyone has materials that they can e-mail to me, I'd really appreciate it.
I'm at parity@optonline.net

What study materials should I buy? I assume the official ETS GMAT
book and Kaplan's...
10. ## Thread: Problem of number theory

by Eternal
Replies
13
Views
2,347

### That 3x+7y is divisible by 11 is written...

That 3x+7y is divisible by 11 is written shorthand as
3x+7y =0 (11). If that is the case, multiplying
3x+7y by any integer will also be 0 (11), as will adding or subtracting
any multiple of 11x...

by Eternal
Replies
6
Views
907

### You give such well-written answers. Are you...

You give such well-written answers. Are you single? ;)

-E
12. ## Thread: 480 ( 41 Q and 16 V) : I am thoroughly shattered

by Eternal
Replies
8
Views
2,688

### Take it again! This might come as a surprise...

Take it again!

This might come as a surprise to some students, but you are allowed to mess
up on a test! Your life is not over, just take it again!

Do well on it next time and you'll be fine....
13. ## Thread: Two week notice :-(

by Eternal
Replies
4
Views
1,057

### Being out of university for years will actually...

Being out of university for years will actually make the test easier in some
ways. You should find that your vocabulary is a strong point.

If you once knew the maths, it'll come back very...

by Eternal
Replies
3
Views
1,179

### I agree with that strategy. Hopefully he is good...

I agree with that strategy. Hopefully he is good at maths, then learning the
small vocabulary he needs for the SAT math should be simple.

I disagree a little, he should start learning the...
15. ## Thread: driller for software systems

by Eternal
Replies
30
Views
4,183

### A good way to deal with problems like this is to...

A good way to deal with problems like this is to prove upper and lower
bounds by induction.

We have that f(n)=1 for n<=1. I claim that n<=f(n)<=3n; this is
true for n<=1.

Assume true for...
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