Search found 4 matches
i think the answer choices are not too close together, so you can work with estimates
x^2 =~0.5 (0.49)
2.4x = ~1.7
so 1-1.7-1.7 = -2.4
- by schreze
Tue Sep 20, 2011 5:38 am- Forum: Problem Solving
- Topic: Difficult numbers
- Replies: 6
- Views: 2155
- by schreze
Wed Sep 14, 2011 7:47 am- Forum: Problem Solving
- Topic: How many solution has (x^2+1)/(x-1)=x?
- Replies: 3
- Views: 1079
100 - 80 = 20% do not like cherries
100 - 75 = 25% do not like bananas
100 - 70 = 30% do not like applies
20 + 25 + 30 = 75% do not like one (or more) of the mentioned.
1 - 75% = 25% like all three. Answer is C
(however - the solution above by the expert is easier/faster, no doubt...)
- by schreze
Wed Sep 14, 2011 4:03 am- Forum: Problem Solving
- Topic: plzz.....expalin the following question...
- Replies: 2
- Views: 1368
Exponents problem
Hi all, I just came across following question:
(1/5)^m (1/4)^18 = 1 / [2(10)^35]
Question: what is the value of m?
(A) 17
(B) 18
(C) 34
(D) 35
(E) 22
I have no idea how to do this and would appreciate your help.
- by schreze
Sun Sep 11, 2011 8:21 am- Forum: Problem Solving
- Topic: Exponents problem
- Replies: 3
- Views: 1063