Search found 11 matches

Author Message
mattocks
Replies:
3
Views:
1074
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0

Milk Man

Forum:
Problem Solving
Posted:
Sat Jul 24, 2010 6:47 am
A milkman adds 5 liters of water to a certain quantity of pure milk costing $3 per liter. He sells the mixture at the same price as before and makes a 20% profit. What is the percentage milk in the ...
mattocks
Replies:
8
Views:
1523
Thanks:
0

Right triangle problem

Forum:
Problem Solving
Posted:
Mon Jul 19, 2010 4:09 pm
A circle is circumscribed about an equilateral triangle of side 'a'. The diameter of the circle is?

A. a*root3
B. a/root3
C. 2a/root3
D. 2*root3(3a)
E. 3root3(a)
mattocks
Replies:
8
Views:
1523
Thanks:
0

Right triangle problem

Forum:
Problem Solving
Posted:
Sun Jul 18, 2010 10:19 am
For right triangle RST, RS and RT are legs and RT+RS=12. ST is hypotenuse with length 10. What is the area of the right triangle?

A) 24
B) 11
C) 15
D) 2*sqrt(30)
E) 12
mattocks
Replies:
2
Views:
681
Thanks:
0

Missing digits

Forum:
Problem Solving
Posted:
Sun Jul 18, 2010 8:29 am
7x
xy
xx
__

117

The above represents addition with x and y representing certain digits. What is the value of y?

A. 1
B. 2
C. 3
D. 4
E. 5
mattocks
Replies:
5
Views:
4810
Thanks:
0

Difficult Work/Rate Problem

Forum:
Problem Solving
Posted:
Tue Jul 13, 2010 3:58 pm
13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy, and 1 woman working together finish the same job (assume ...
mattocks
Replies:
7
Views:
1921
Thanks:
0

Difficult Exponents Problem

Forum:
Problem Solving
Posted:
Sun Jul 11, 2010 10:45 am
If the square root of the product of three distinct positive integers is equal to the largest of the three numbers, what is the product of the two smaller numbers?

(1) The largest number of the thr ...
mattocks
Replies:
7
Views:
1921
Thanks:
0

Difficult Exponents Problem

Forum:
Problem Solving
Posted:
Sun Jul 11, 2010 9:24 am
Great explanation. Thank you ! I have one more...

If x and j are integers and (12^x)*(4^2x+1)=(2^j)*(3^2), what is the value of j?

A) 5
B) 7
C) 10
D) 12
E) 14

So 4^2x+1 = (2^2)^2x+1 = 2 ...
mattocks
Replies:
7
Views:
1921
Thanks:
0

Difficult Exponents Problem

Forum:
Problem Solving
Posted:
Sun Jul 11, 2010 8:50 am
If x=10^100 and x^x=10^k, k=?.

A) 10^5
B) 10^102
C) 10^99
D) 10^200
E) 10^98

I'm really not sure how to attack this problem. Any suggestions would be greatly appreciated.
mattocks
Replies:
2
Views:
1485
Thanks:
0

Venn Diagram Problem

Forum:
Problem Solving
Posted:
Sun Mar 28, 2010 11:30 am
All coffee mixtures sold in a store contain Colombian, Jamaican or Brazilian coffee or some combination of these. Of all mixtures, 33 contain Colombian coffee, 43 contain Jamaican coffee and 42 conta ...
mattocks
Replies:
2
Views:
4150
Thanks:
0

Difficult Work/Rate Problem

Forum:
Problem Solving
Posted:
Sun Mar 28, 2010 11:27 am
Can someone explain the best way to approach this problem?

It takes machine A x hours to manufacture a deck of cards that machine B can manufacture in 1/x hours. If machine A operates alone for y ...
mattocks
Replies:
6
Views:
3371
Thanks:
0

Difficult Work/Rate Problem

Forum:
Problem Solving
Posted:
Sun Mar 28, 2010 11:23 am
Can someone explain the best way to solve this problem?

13 men and 7 boys can finish a job in 7 days, while 6 boys and 13 women can finish the same job in 6 days. In how many days can 1 man, 1 boy ...
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