Search found 98 matches
I arrived at the same answer ==>8.
h+w = 25*2 = 50
when son was born after 2 yrs, h+w = 54
now h + w +s = 24*3=72
72-54 = 18 = years of h , w and s *3==>6 yrs. so total is 6+2==>8.
Ajith has done it well algebraically 
- by ace_gre
Thu Jan 28, 2010 12:10 am- Forum: Problem Solving
- Topic: the couple got married?
- Replies: 4
- Views: 4034
Hi, Since the last digit of the amount is 7 and the number of things is 47, using number properties..Last digit has to be 1. 7*1=7 7*7=.9 7^3=..3 7^4=...1 7^5=...7 Now A,C and E are the contenders.. Started with A, 47*2.31 = 108.37 However I think there is more that can be narrowed down...how to cho...
- by ace_gre
Wed Jan 27, 2010 11:57 pm- Forum: Problem Solving
- Topic: illegible hand?
- Replies: 5
- Views: 1212
Hi, Since there are 24 numbers, each of the digits 1, 2, 3 and 4 will appear in the units digit 6 times, ten's digit 6 times, hundred's digit 6 times and thousand's digit 6 times. Now adding the unit's digit ==> 6*1 + 6*2 + 6*3 + 6*4 = 6 + 12 +18 + 24 = 60-------(1) So the unit's digit of the sum = ...
- by ace_gre
Wed Jan 27, 2010 4:13 pm- Forum: Problem Solving
- Topic: sum of the numbers
- Replies: 1
- Views: 1321
My approach would be to resolve the fractions into prime factors. In this case whichever number has the largest denominator is the smallest number. After resolving into prime factors cancel out the common terms ... A) 3^2 * 5^6 * 2^2 B) 2 ^4 * 5^7 C) 5^7 * 2^3 D) 2^2 * 5^7 E) 3 * 2^4 *5^6 Then cance...
- by ace_gre
Mon Jan 25, 2010 11:35 pm- Forum: Problem Solving
- Topic: smallest number
- Replies: 5
- Views: 1407
typing problem
Working together, John and Jack can type 20 pages in one hour. They will be able to type 22 pages in one hour if Jack increases his typing speed by 25%. What is the ratio of Jack's normal typing speed to that of John?
A) 1/3
B) 2/5
C) 1/2
D) 2/3
E) 3/5
I do not have the OA. Can someone help? Thanks
- by ace_gre
Mon Jan 25, 2010 9:55 pm- Forum: Problem Solving
- Topic: typing problem
- Replies: 1
- Views: 2122
Tom, John and Peter working together
Tom, working alone, can paint a room in 6 hours. Peter and John, working independently, can paint the same room in 3 hours and 2 hours, respectively. Tom starts painting the room and works on his own for one hour. He is then joined by Peter and they work together for an hour. Finally, John joins the...
- by ace_gre
Mon Jan 25, 2010 9:37 pm- Forum: Problem Solving
- Topic: Tom, John and Peter working together
- Replies: 3
- Views: 7967
treehouse
One smurf and one elf can build a treehouse together in two hours, but the smurf would need the help of two fairies in order to complete the same job in the same amount of time. If one elf and one fairy worked together, it would take them four hours to build the treehouse. Assuming that work rates f...
- by ace_gre
Mon Jan 25, 2010 9:15 pm- Forum: Problem Solving
- Topic: treehouse
- Replies: 2
- Views: 3673
After some contemplation, here is my way.. Let the capacity of the pool be x and the number of hours the inlet valve was open be n. Then 10-n will be the no. of hours both inlet and drain valves were open. When both inlet and outlet valve was open then net gain in the pool = x/4 - x/5 = x/20 Accordi...
- by ace_gre
Mon Jan 25, 2010 8:31 pm- Forum: Problem Solving
- Topic: pool and valves
- Replies: 8
- Views: 1840
pool and valves
A pool can be filled in 4 hours and drained in 5 hours. The valve that fills the pool was opened at 1:00 pm and some time later the drain that empties the pool was also opened. If the pool was filled by 11:00 pm and not earlier, when was the drain opened? A) at 2:00 pm B) at 2:30 pm C) at 3:00 pm D)...
- by ace_gre
Mon Jan 25, 2010 5:58 pm- Forum: Problem Solving
- Topic: pool and valves
- Replies: 8
- Views: 1840
printer and pages
It takes printer A 4 more minutes than printer B to print 40 pages. Working together, the two printers can print 50 pages in 6 minutes. How long will it take printer A to print 80 pages?
A) 12
B) 18
C) 20
D) 24
E) 30
I do not have the OA. Hope someone can help solve this. Thanks!
- by ace_gre
Mon Jan 25, 2010 5:19 pm- Forum: Problem Solving
- Topic: printer and pages
- Replies: 3
- Views: 2061
Circumference of the circle which forms the ice-cream is 3/4th of the circle==> an angle equivalent to 3/4 * 360 = 270.
The remainder of the circle forms an isosceles right triangle with the center.
Using pythagoras theorem, base = (4 + 4) ^1/2.
Hope the diagram in the attachment helps !
- by ace_gre
Sun Jan 24, 2010 12:24 pm- Forum: Problem Solving
- Topic: Geom / %age
- Replies: 12
- Views: 2250
Hi,
Find all multiples of 3 upto 30.
P = (3,6,9,12,15....30)
There are 10 of them.
P = 3^10(1,2,3,4...10)
Now look for multiples of 3 again.. 3,6,9.
There are 4 3's.
So 3 ^14 is a factor of p. IMO k=14
- by ace_gre
Fri Jan 22, 2010 2:17 pm- Forum: Problem Solving
- Topic: Erratum: it's 3^k factor of p and not 3k factor of p
- Replies: 2
- Views: 1390
Distance between (2,-3) and (5,0) is( (x1-x2)^2 + (y1-y2)^2)^1/2
Radius = ((2-5)^2 + (-3)^2)^1/2
==> (18)^1/2
Area of circle = pie r^2
==> 18 pie
- by ace_gre
Fri Jan 22, 2010 1:11 pm- Forum: Problem Solving
- Topic: In the coordinate plane, a circle has center (2, -3)
- Replies: 8
- Views: 5312
Hi, Here is my approach.
Say the capacity of tank is T.
n+ T/3 = 7T/9
n = 7T/9 - T/3
n= 4T/9
T = 9n/4
I am assuming that ns in the choices are in the numerator.
- by ace_gre
Fri Jan 22, 2010 1:07 pm- Forum: Problem Solving
- Topic: Might be really easy but couldn't figure it out
- Replies: 4
- Views: 2761
- by ace_gre
Thu Jan 21, 2010 10:32 pm- Forum: Problem Solving
- Topic: quadratics - value question
- Replies: 4
- Views: 1291