A number whose fifth part increased by 6 is equal to its fourth part diminished by 6 is ?	Choose the correct choice from the following choices:
A) 160
B) 180
C) 200
D) 240
E) none

Rationale: "answer let the number be n . then , ( n / 5 ) + 6 = ( n / 4 ) - 6 â ‡ ’ ( n / 4 ) - ( n / 5 ) = 12 â ‡ ’ ( 5 n - 4 n ) / 20 = 12 â ˆ ´ n = 240 option : d"
Answer: D