(180% of ?)/2=504

What well Centre in place of the question mark (?) in the following questions? % " of" 800 + (12)^2 = 504

24 : 60 : : 210 : ? (A) 504 (B) 343 (C) 336 (D) 330

An Index of retail prices is the mean of the five other price index numbers which are weighted as follows: The original index of retail prices are established at 100. If the following percentage increases in the various indices have occurred since that time, find the index of retail prices now. A=55% , B= 180%, C=60%, D=45%, E=90% .

Solve [180%backslash of backslash(?)]-:2=504a.400b600c.560d.480

40% of 60% of 3/5t h of a number is 504.what is 25% of 2/5 th of that number? 175 b. 180 c. 350 d. 360

Prove that (9!)/((9 - 3)!) = 504

(3)/(5) "of" (4)/(7) "of" (5)/(9) "of" (21)/(24) "of" 504=?