mattocks
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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 ...
