ANSWER
43 is the answer
Explanation
From Equation 1: 10 + 10 + 10 = 30 (So Shoes = 10)
From Equation 2: 5 + 5 + 10 = 20 (So Man = 5)
From Equation 3: (2 +2) + (2 + 2) + 5 = 13 (So a single ribbon = 2)
Equation 4 is: 5 + (5 + 4 + 10 ) x 2 = 43 (In this equation, there is only 1 shoe, so shoe = 5 ; Also ribbons are tied in man's both hands and he is wearing shoes in this equation, so (Man = 5 ; Ribbons = 2 + 2 ; Shoe = 10) . Then in the last part there is a single ribbon which is = 2 )
So according to BODMAS rule,
5 + (5 + 4 + 10 ) x 2
=> 5 + (19 x 2)
=> 5 + 38
=> 43
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