Search found 7 matches
What if w = 4 and x = -2?
The question did not mention w and x must be positive or negative integers.
- by leekaru14
Tue Jul 29, 2014 11:19 pm- Forum: Problem Solving
- Topic: Challenging DS
- Replies: 19
- Views: 9937
I still have a disturbance
"How many pages does digit 9 appear in the numeration?"
That means we only count one digit 9 in the number 99, right?
- by leekaru14
Wed Jun 11, 2014 1:38 am- Forum: Problem Solving
- Topic: pages of the book
- Replies: 28
- Views: 16156
In a certain game, a large bag is filled with blue, green, purple and red chips worth 1, 5, x and 11 points each, respectively. The purple chips are worth more than the green chips, but less than the red chips. A certain number of chips are then selected from the bag. If the product of the point va...
- by leekaru14
Wed Sep 25, 2013 2:04 am- Forum: Problem Solving
- Topic: More Primes
- Replies: 93
- Views: 45638
Bob gets: $4 + 1/3 remaining
Chloe gets: 2/3 remaining = 32
==> Bob gets: $4 + $16 = $20
I expected a trap in your question. 
- by leekaru14
Wed Sep 25, 2013 1:38 am- Forum: Problem Solving
- Topic: Tough word problem - dividing $
- Replies: 69
- Views: 33887
If n is a positive integer and r is the remainder when n^2-1 is divided by 8, what is the value of r? 1)n is odd 2)n is not divisible by 8 You might notice that this is a difference of squares: n^2 - 1 = (n+1)(n-1) If n is odd, then n-1 and n+1 are consecutive even integers. If you take any two con...
- by leekaru14
Sun Sep 22, 2013 11:59 pm- Forum: Data Sufficiency
- Topic: Remainder Prob
- Replies: 74
- Views: 40090
The answer is Choice B. The main problem of this question is the unclear subject. We have "spicy foods" and "some people" in the first clause. In the second clause, the sentence use "they". We don't know if this "they" indicates to "spicy foods" or &...
- by leekaru14
Wed Sep 18, 2013 12:29 am- Forum: Sentence Correction
- Topic: Spicy
- Replies: 151
- Views: 70782
The answer is choice D. I divide the workload into 180 widgets. In one hour: - Printer x can finish: 180/12 = 15 widgets. - Printer y can finish: 180/15 = 12 widgets. - Printer z can finish: 180/18 = 10 widgets. So in one hour y and z can finish: 22 widgets. Therefore it takes them 190/22 = 90/11 ho...
- by leekaru14
Wed Sep 18, 2013 12:21 am- Forum: Problem Solving
- Topic: og math # 130
- Replies: 132
- Views: 58254