Search found 487 matches
8AM 9AM 10 AM 11AM ............. 6PM (18hrs)
13 13 +x 13+2x 13+3x =46..............112
13+3x=46
x=11
t10 ( 18hr -8hr=10) = 13+(10-1)11=112
Choose B
- by dtweah
Thu May 13, 2010 7:01 am- Forum: Problem Solving
- Topic: logs on the pile
- Replies: 7
- Views: 1592
For Summer months 88 rooms occupied /100 hotel rooms
For rest of year 44 rooms occupied/100 hotel rooms
For whole year 132 rooms occupied /200 hotel rooms = .66
- by dtweah
Thu May 13, 2010 6:49 am- Forum: Problem Solving
- Topic: occupancy percentage
- Replies: 9
- Views: 2508
Suppose 7 monkeys take 7 minutes to eat 7 bananas. How many minutes would it take 2 monkeys to eat 2 bananas? (A) 2 (B) 2.5 (C) 3 (D) 3.5 (E) 7 The best way to handle these problems which can be tricky is to use intuition. Formulas will lose u when the problem isTWEAKED. Always reduce it to amount ...
- by dtweah
Thu May 13, 2010 6:14 am- Forum: Problem Solving
- Topic: take 2 monkeys
- Replies: 7
- Views: 3321
(Root( 78, 79, 80, 81) )^2ramyaravindran wrote:This may be a simple concept but it is eluding me now. How can you quickly estimate if sqrt(78*79*80*81) is greater than or less than 6400?
(80 80 )^2
78 78 80 81
80 80 80 80
- by dtweah
Tue Mar 09, 2010 1:46 pm- Forum: Problem Solving
- Topic: quick comparison
- Replies: 3
- Views: 1035
Calculate rate of drainage. Tap 1 1P/ 4min or 1P/4min x 1g/8p = 1g/32min Tap 2 1q/6min or 1q/6min x 1g/4q = 1g/24min So we know every 32 mins, 2 gals leave the barrel. We just have to figure out how many 32 mins are there in 492 mins . (the number of mins from 12noon to 8:12pm) For example (24 mins ...
- by dtweah
Mon Mar 08, 2010 6:47 am- Forum: Problem Solving
- Topic: beer at 12 noon
- Replies: 2
- Views: 2936
If 125% of j is equal to 25% of k, 150% of k is equal to 50% of l, and 175% of l is equal to 75% of m, then 20% of m is equal to what percent of 200% of j ? a 0.35 b 3.5 c. 35 d. 350 e. 3500 My approach: 1.25J=0.25K => K=5J 1.5K=0.5l => l=3K 0.75m=1.75l => m=(7/3)l 0.2m=2j*x; X=? 2j*x= 0.2m 2j*x= 0...
- by dtweah
Mon Mar 08, 2010 6:40 am- Forum: Problem Solving
- Topic: Percentage
- Replies: 22
- Views: 11392
The total cost of water for one year in Community Z of 120,000 homes is $75,000. If the cost were to increase to $80,000 for the community, by approximately what percent would the average cost of water increase for each household in Community Z ? a. 70% b. 13% c. 7% d. 5% e. 1.3% OA: c My approach:...
- by dtweah
Mon Mar 08, 2010 6:26 am- Forum: Problem Solving
- Topic: Average cost of water
- Replies: 1
- Views: 1857
Circle in a Quadrilateral
A circle is inscribed in quadrilateral ABCD where the circle is tangent to each side of the quadrilateral , with AB = 16 and CD = 10. What is the perimeter of the quadrilateral?
(a) 50
(b) 52
(c) 54
(d) 56
(e) 58
- by dtweah
Mon Mar 08, 2010 1:52 am- Forum: Problem Solving
- Topic: Circle in a Quadrilateral
- Replies: 4
- Views: 1461
Probability meets Die
A standard, fair, 6-sided die is rolled 8 times. Given that the number
3 appears exactly three times, what is the probability that no two 3's
appear on consecutive rolls?
(a) 5/14
(b) 3/7
(c) 1/2
(d) 4/7
(e) 9/14
- by dtweah
Sun Mar 07, 2010 2:53 pm- Forum: Problem Solving
- Topic: Probability meets Die
- Replies: 4
- Views: 1118
Probability in a theater
Seven people are sitting in a theater watching a show. The row they are in contains seven seats. After intermission, they return to the same row but choose seats randomly. What is the probability that neither of the people sitting in the two aisle seats was previously sitting in an aisle seat? (a) 3...
- by dtweah
Sun Mar 07, 2010 2:14 pm- Forum: Problem Solving
- Topic: Probability in a theater
- Replies: 3
- Views: 1442
Square Inscribed and Circumscribed
What is the ratio of the area of a square that circumscribes a circle to
the area of a square that inscribes the same circle?
(a) sqrt2
(b) sqrt3
(c) 2
(d) sqrt 6
(e) 3
- by dtweah
Sun Mar 07, 2010 2:09 pm- Forum: Problem Solving
- Topic: Square Inscribed and Circumscribed
- Replies: 1
- Views: 781
Fair and Biased Coin
A box contains 4 fair coins and 6 biased coins. Whenever a fair coin is fipped, it comes up heads with probability 0:5. Whenever a biased coin is ipped, it comes up heads with probability 0:8. A coin is randomly chosen from the box and then ipped. What is the probability that it will come up heads? ...
- by dtweah
Sun Mar 07, 2010 1:08 pm- Forum: Problem Solving
- Topic: Fair and Biased Coin
- Replies: 1
- Views: 2742
Algebra
If a + b = 2 and a^2 + b^2 = 5, then what is the value of a^3 + b^3 ?
(a) 11
(b) 12
(c) 13
(d) 14
(e) 15
- by dtweah
Sun Mar 07, 2010 1:05 pm- Forum: Problem Solving
- Topic: Algebra
- Replies: 4
- Views: 1124
Here is one intuitive way. Draw your ven diagram of A and S and put X at the intersection. Now if 3/5 are action movies, then 2/5 are NOT action movie or are ONLY Science moivies. PUt 2/5 in in the only Science portion. ( This area is the complement of A). But u are told All of S is 4/5. So total S ...
- by dtweah
Sun Mar 07, 2010 6:57 am- Forum: Problem Solving
- Topic: Overlapping Method
- Replies: 2
- Views: 2050
n questions can either be true or false. If you answer all n correct you win. What is the least value of n for which the probability is less than 1/1000 for you to win by guessing randomly? a. 5 b. 10 c. 50 d. 100 e. 1000 An easy way to see this is to consider the problem as a toss of a fair coin. ...
- by dtweah
Thu Feb 11, 2010 6:27 am- Forum: Problem Solving
- Topic: Probability
- Replies: 7
- Views: 4569