Search found 38 matches
Thankyou very much for the explanation... So basically we need to calculate the CRITICAL POINT in inequalities question of this type? The CRITICAL POINT APPROACH is a great way to handle complex inequality problems. If you enter "critical points" and "gmatguruny" into the BTG se...
- by subhakam
Tue Mar 18, 2014 7:51 am- Forum: Data Sufficiency
- Topic: Inequality Question
- Replies: 14
- Views: 2997
Thankyou very much for the explanation... So basically we need to calculate the CRITICAL POINT in inequalities question of this type? The CRITICAL POINT APPROACH is a great way to handle complex inequality problems. If you enter "critical points" and "gmatguruny" into the BTG se...
- by subhakam
Tue Mar 18, 2014 7:17 am- Forum: Data Sufficiency
- Topic: Inequality Question
- Replies: 14
- Views: 2997
In the number line, point A, B, C, D, and E are spaced equally. If point A represents 3^11 and point B represents 3^12, point E represents which of the following values? (A) 3^11+3^12 (B) 3^13 (C) 3^12+3^13 (D) 3^14 (E) 3^15 B Here's another approach: First, let's examine some OTHER examples of equ...
- by subhakam
Thu Sep 12, 2013 6:43 pm- Forum: Problem Solving
- Topic: number system
- Replies: 3
- Views: 1695
- by subhakam
Fri Sep 06, 2013 5:52 am- Forum: Data Sufficiency
- Topic: ABsolute Value Trap
- Replies: 11
- Views: 4192
- by subhakam
Fri Sep 06, 2013 5:49 am- Forum: Problem Solving
- Topic: Inequality
- Replies: 9
- Views: 2669
Question courtesy Manhattan GMAT CAT Is x > 0? (1) |x + 3| = 4x – 3 (2) |x + 1| = 2x – 1 Here's the algebraic approach. Target question : Is x > 0? Statement 1 : |x + 3| = 4x – 3 We'll use the following rule: If |A| = B then A = B or A = -B Here, we get: We get: x + 3 = 4x - 3 or x + 3 = -(4x...
- by subhakam
Thu Sep 05, 2013 5:02 pm- Forum: Data Sufficiency
- Topic: ABsolute Value Trap
- Replies: 11
- Views: 4192
Anju - I did not understand this following equation/explanation that you stated for the algebraic route |x + 3| = 4x - 3 (question when (x+3) is positive) Now, if x ≥ -3, |x + 3| = (x + 3) Why should x be greater than or equal to 3 , it should be x greater than 3 this is because as i understand ab...
- by subhakam
Thu Sep 05, 2013 4:58 pm- Forum: Data Sufficiency
- Topic: ABsolute Value Trap
- Replies: 11
- Views: 4192
if a>b and p<q then which of the following is true? A) a-q <b-p B) a-p>b-q C) b+p>a-q D) b+p<a+q E) a+p>b-q Pls explan Important: We can ADD inequalities, but we cannot subtract them. In order to add inequalities, the inequality signs must be facing in the same direction. So, take a > b and rewrite...
- by subhakam
Thu Sep 05, 2013 1:37 pm- Forum: Problem Solving
- Topic: Inequality
- Replies: 9
- Views: 2669
macattack -- yeah, you're right here. nice work. as usual, i misread the problem (yay! dyslexia is fun) as "three-digit code" instead of "three-digit number". so, in other words, i was thinking about 000-999 instead of 100-999. so, yes, that works. using the "opposite situa...
- by subhakam
Wed Aug 07, 2013 7:34 pm- Forum: Problem Solving
- Topic: help
- Replies: 19
- Views: 3714
At 1:00 PM, Train X departed from Station A on the road to Station B. At 1:30 PM, Train Y departed Station B on the same road for Station A. If Station A and Station B are p miles apart, Train XÂ’s speed is r miles per hour, and Train Y'Â’s speed is s miles per hour, how many hours after 1:00 PM, i...
- by subhakam
Tue May 14, 2013 6:03 pm- Forum: Problem Solving
- Topic: tough question
- Replies: 6
- Views: 1473
Joan, Kylie, Lillian, and Miriam all celebrate their birthdays today. Joan is 2 years younger than Kylie, Kylie is 3 years older than Lillian, and Miriam is one year older than Joan. Which of the following could be the combined age of all four women today? Here is the explanation for official answe...
- by subhakam
Wed Mar 13, 2013 6:06 pm- Forum: Problem Solving
- Topic: Mgmat CAT PS question
- Replies: 4
- Views: 1361
Anju - can you help me algebraically how you are getting the below please? And if x < 0, |x| = -x ---> -x < x² ---> x < -1 ? We know, -x < x² Now I divided both sides by x and as x < 0, the sign of the inequality changes . So, -x/x > x²/x ---> -1 > x ---> x < -1 Per my calculation -x<x² => 0< x...
- by subhakam
Tue Mar 12, 2013 5:57 pm- Forum: Problem Solving
- Topic: Tough inequality 1
- Replies: 10
- Views: 1355
If |x|<x^2 , which of the following must be true? Note that, x cannot be equal to zero. Now if x > 0, |x| = x ---> x < x² ---> x > 1 And if x < 0, |x| = -x ---> -x < x² ---> x < -1 Hence, either x < -1 or x > 1 Now, I. x² > 1 ----> Always true II. x > 0 ----> Not always true as x can be less tha...
- by subhakam
Tue Mar 12, 2013 4:43 pm- Forum: Problem Solving
- Topic: Tough inequality 1
- Replies: 10
- Views: 1355
If |x|<x^2 , which of the following must be true? I. x^2>1 II. x>0 III. x<-1 (A) I only (B) II only (C) III only (D) I and II only (E) I and III only The question asks us to determine which of the statements MUST be true. So, if we can find a case in which a statement need not be true, we can elimi...
- by subhakam
Tue Mar 12, 2013 4:39 pm- Forum: Problem Solving
- Topic: Tough inequality 1
- Replies: 10
- Views: 1355
ok so obviously i'm having some trouble understanding solutions. http://s4.postimage.org/vpfw0b38/btg.jpg i don't understand how statement A is sufficient. The video solution states that since we're given that BD = 6 sq. rt 3, that makes triangle BCD only one specific triangle with side 6, 6 sq. rt...
- by subhakam
Mon Mar 04, 2013 5:43 pm- Forum: Data Sufficiency
- Topic: BTG-PQ "If CD = 6, what is the length of BC?"
- Replies: 8
- Views: 4018