In a mall, some rubik's cubes and toy rifles were on sale. ¹₅ of the items were rubik's cubes. ¹₃ of the rubik's cubes and 184 toy rifles were sold. There were ¹₆ of the items left in the mall. How many rubik's cubes and toy rifles were there in the mall at first?

	Rubik's cubes	Toy rifles	Total
Comparing rubik's cubes  and toy rifles at first	1x6 = 6 u	4x6 = 24 u	5x6 = 30 u
Before	3x2 =  6 u		6x5 = 30 u
Change	- 1x2 = - 2 u	- 184	- 5x5 = - 25 u
After	2x2 = 4 u	1 u	1x5 = 5 u

 
The total number of toys at first is repeated.  Make the total number of toys at first the same. LCM of 5 and 6 is 30.

The number of rubik's cubes at first is repeated.  Make the number of rubik's cubes the same. LCM of 6 and 3 is 6. 

Number of toy rifles left
= 5 u - 4 u
= 1 u

Number of toy rifles sold
= 24 u - 1 u
= 23 u

23 u = 184

1 u = 184 ÷ 23 = 8

Number of rubik's cubes and toy rifles at first
= 30 u
= 30 x 8
= 240

Answer(s): 240