There are 450 birds at a small zoo. The number of birds is 5 times the number of all the other animals combined. How many more birds are there than non bird animals at the zoo?	Choose the correct choice from the following
A) 400	B) 360	C) 270	D) 180	E) 90

Rationale: total birds = 450 = 5 * other animals ( x ) or x = 90 . so , difference in birds and x = 450 - 90 = 360 . answer is b .
Answer: B