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What is the largest value of non-negative integer N for which 10^N is a factor of 50!? A. 5 B. 6 C. 12 D. 15 E. 20 The OA is C Source: GMAT Prep Since 10=2*5, the goal is to count the number of 5's in 50! All multiples of 5 have a 5. There are 10 multiples of 5 from 1-50 inclusive, which you can fi...
- by jaetpu
Thu Jan 03, 2019 11:07 pm- Forum: Problem Solving
- Topic: What is the largest value of non-negative integer N for
- Replies: 4
- Views: 990
Im completely confused with the answer...I know I must be overlooking something. Car X left Town T traveling at an average speed of 40 miles per hour. Car Y left Town T 18 minutes after car X left Town T, and car Y traveled at an average speed of 54 miles per hour. When car Y had traveled for z min...
- by jaetpu
Thu Jan 03, 2019 10:57 pm- Forum: Problem Solving
- Topic: Car X left Town T (RATE PROBLEM, Need Help)
- Replies: 4
- Views: 6634
I tried solving this question even with the little hint given but still don't know how to proceed. If it helps the options given for this question are as follows - 1) a = 2b 2) a + b =3 3) a - b = 3 4) a + b = 5 Any conditions given for what a and b are? If a and b are prime, prime factorization of...
- by jaetpu
Thu Jan 03, 2019 10:44 pm- Forum: Problem Solving
- Topic: HCF
- Replies: 5
- Views: 5019
answer
If $$\left|X^2\ -\ 6\right|\ =\ X$$ , which of the following could be the value of x? A) -2 B) 0 C) 1 D) 3 E) 5 Absolute values can be time-consuming to deal with, because you have to split into two different cases and work them out. In this situation, the approach Brent mentioned, testing the answ...
- by jaetpu
Thu Jan 03, 2019 10:28 pm- Forum: Problem Solving
- Topic: Absolute value
- Replies: 4
- Views: 960
answer
Your expression can be modified by commutative and associative properties. (6^5)*(5^6) = 6^5 * 5^5 * 5 = (6*5)^5 * 5 You can combine 6^5 and 5^5 into (6*5)^5 because both terms have the same power. Notice that 5^6 is higher powered than 6^5. You can only combine the two terms up to the lesser power ...
- by jaetpu
Tue Jun 19, 2018 11:35 pm- Forum: GMAT Math
- Topic: Reformatting a number
- Replies: 3
- Views: 2397
Here is how you want to approach
Is the number of members of Club X greater than the number of members of Club Y? 1. Of the members of Club X, 20% are also members of club Y 2. Of the members of Club Y, 30% are also members of club X The OG is explanation is too long and complex to understand. Is there a simpler method using Venn ...
- by jaetpu
Tue Jun 19, 2018 11:30 pm- Forum: GMAT Math
- Topic: OG 18 - DS- Q362 - How to solve it quickest?
- Replies: 4
- Views: 3765