Hey again,
This is on page 851 #15 on the SAT OG Book.
If multiply multiply =
for positive integers n and k, what is the value of k?
a) 1
b)5
c) 24
d) 25
e)26
THanks in advance
Hello, fabxx!
If for positive integers and , what is the value of ?
. .
We have: .
We see that is either 5 or a multiple of 5 (and the fraction is reduced).
The fraction is: .
It is comprised of three consecutive numbers, like
. . Hence, the fraction cannot be reduced.
Therefore: . ... answer (c)