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342 of 433 questions match · page 7 of 18. Answer in your head first, then check the solution.

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#121📜 EE Board October 1992📘 1001 Math RojasHard
Given: \(\log 6 + x \log 4 = \log 4 + \log(32+4^x)\). Find \(x\).
A2
B3
C4
D6
#122📜 ECE November 1998📘 1001 Math RojasEasy
If \(\log\) of 2 to the base 2 plus \(\log\) of \(x\) to the base 2 is equal to 2, then the value of \(x\) is,
A4
B-2
C2
D-1
#123📜 ME Board October 1997📘 1001 Math RojasEasy
Find the value of \(x\) if \(\log_{12} x = 2\).
A144
B414
C524
D425
#124📘 1001 Math RojasMedium
Solve for the value of \(x\): \(\log 2x^3+\log\frac{6}{x}=6.278\)
A379.65
B365.97
C397.56
D356.79
#125📜 ECE Board April 1995📘 1001 Math RojasMedium
Mary is 24 years old. Mary is twice as old as Ann was when Mary was as old as Ann is now. How old is Ann now?
A16
B18
C12
D15
#126📜 EE Board April 1997📘 1001 Math RojasMedium
The sum of Kim's and Kevin's ages is \(18\). In \(3\) years, Kim will be twice as old as Kevin. What are their ages now?
A4, 14
B5, 13
C7, 11
D6, 12
#127📜 GE Board February 1994📘 1001 Math RojasMedium
Robert is \(15\) years older than his brother Stan. However "y" years ago, Robert was twice as old as Stan. If Stan is now "b" years old and \(b>y\), find the value of \((b - y)\).
A15
B16
C17
D18
#128📘 1001 Math RojasMedium
JJ is three times as old as Jan-Jan. Three years ago, JJ was four times as old as Jan-Jan. The sum of their ages is
A20
B24
C28
D36
#129📘 1001 Math RojasMedium
A girl is one-third as old as her brother and \(8\) years younger than her sister. The sum of their ages is \(38\) years. How old is the girl?
A4
B5
C6
D7
#130📘 1001 Math RojasEasy
Paula is now \(18\) years old and his colleague Monica is \(14\) years old. How many years ago was Paula twice as old as Monica?
A5
B7
C8
D10
#131📘 1001 Math RojasMedium
A father tells his son, "I was your age now when you were born." If the father is now \(38\) years old, how old was his son \(2\) years ago?
A15
B17
C19
D21
#132📘 1001 Math RojasMedium
Six years ago, Nilda was five times as old as Riza. In five years, Nilda will be three times as old as Riza. What is the present age of Riza?
A17
B16
C15
D14
#133📘 1001 Math RojasHard
At present, the sum of the parents' ages is twice the sum of the children's ages. Five years ago, the sum of the parents' ages was \(4\) times the sum of the children's ages. Fifteen years hence, the sum of the parents' ages will be equal to the sum of the children's ages. How many children are there?
A3
B4
C5
D6
#134📘 1001 Math RojasMedium
Debbie is now twice as old as Jerry. Four years ago, Debbie was three times as old as Jerry then. How old is Debbie?
A14
B16
C18
D24
#135📜 ME Board April 1998📘 1001 Math RojasEasy
A pump can pump out water from a tank in \(11\) hours. Another pump can pump out water from the same tank in \(20\) hours. How long will it take both pumps to pump out the water in the tank?
A7 hours
B6 hours
C7 1/2 hours
D6 1/2 hours
#136📜 CE Board November 1993📘 1001 Math RojasMedium
A \(400\)-mm \(\emptyset\) pipe can fill the tank alone in \(5\) hours and another \(600\)-mm \(\emptyset\) pipe can fill the tank alone in \(4\) hours. A drain pipe \(300\)-mm \(\emptyset\) can empty the tank in \(20\) hours. With all the three pipes open, how long will it take to fill the tank?
A2.00 hours
B2.50 hours
C2.25 hours
D2.75 hours
#137📘 1001 Math RojasEasy
A tank is filled with an intake pipe in \(2\) hours and emptied by an outlet pipe in \(4\) hours. If both pipes are opened, how long will it take to fill the empty tank?
A3 hours
B4 hours
C5 hours
D6 hours
#138📘 1001 Math RojasMedium
A tank can be filled in \(9\) hours by one pipe, \(12\) hours by a second pipe and can be drained when full by a third pipe in \(15\) hours. How long will it take to fill an empty tank with all pipes in operation?
A7 hours and 12 minutes
B7 hours and 32 minutes
C7 hours and 42 minutes
D7 hours and 50 minutes
#139📜 ME Board April 1995📘 1001 Math RojasEasy
If A can do the work in "\(x\)" days and B in "\(y\)" days, how long will they finish the job working together?
A\(\frac{x+y}{xy}\)
B\(\frac{x+y}{2}\)
C\(\frac{xy}{x+y}\)
D\(\sqrt{xy}\)
#140📜 ECE Board November 1995📘 1001 Math RojasMedium
Pedro can paint a fence \(50\%\) faster than Juan and \(20\%\) faster than Pilar, and together they can paint a given fence in \(4\) hours. How long will it take Pedro to paint the same fence if he had to work alone?
A6
B8
C10
D12

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