A number whose fifth part increased by 4 is equal to its fourth part diminished by 4 is ?	Choices: A) 160 B) 180 C) 200 D) 220 E) none

Rationale: "answer let the number be n . then , ( n / 5 ) + 4 = ( n / 4 ) - 4 â ‡ ’ ( n / 4 ) - ( n / 5 ) = 8 â ‡ ’ ( 5 n - 4 n ) / 20 = 8 â ˆ ´ n = 160 option : a"
Answer: A