chetan2u wrote:
If m and n are positive integers, what is the value of 3/m + n/4?
\(\frac{3}{m} +\frac{n}{4} =\frac{12+mn}{4n}\)
(1) mn = 12
If m=3 andn=4....\(\frac{12+mn}{4n}=\frac{12+12}{4*4}=\frac{3}{2}\)
If m=1 andn=12....\(\frac{12+mn}{4n}=\frac{12+12}{4*12}=\frac{1}{2}\)
Insufficient
(2) 3/m is in lowest terms and n/4 is in lowestterms.
This means that m is NOT a multiple of 3 and n is NOT a multiple of 2.
We know nothing about m and n.
m and n could be 4 and 3 OR 7 and 7..
answer will be different
Insufficient
Combined..
mn=12=1*12=2*6=3*4..
m and n can be 1 and
...
\(\frac{3}{m} +\frac{n}{4} =\frac{12+mn}{4n}\)
(1) mn = 12
If m=3 andn=4....\(\frac{12+mn}{4n}=\frac{12+12}{4*4}=\frac{3}{2}\)
If m=1 andn=12....\(\frac{12+mn}{4n}=\frac{12+12}{4*12}=\frac{1}{2}\)
Insufficient
(2) 3/m is in lowest terms and n/4 is in lowestterms.
This means that m is NOT a multiple of 3 and n is NOT a multiple of 2.
We know nothing about m and n.
m and n could be 4 and 3 OR 7 and 7..
answer will be different
Insufficient
Combined..
mn=12=1*12=2*6=3*4..
m and n can be 1 and
...
