TCS Company Numerical Ability Profit and Loss

. A Person buys a horse for 15 ponds, after one year he sells it for 20 pounds. After one year, again he buys the same horse at 30 pounds and sells it for 40 pounds. What is the profit for that person?

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TCS Other Question

A man started at his house and travel 50km towards north and take his left and travel 50km and then take right and travel 50km then in which direction he is from his house It is the class with the seating arrangement in 4 rows and 8 columns. When the teacher says start the girl who is sitting in first row and first column will say 1, then the next girl sitting behind her will say 4, the next girl sitting behind that girl will say 7, in a particular order each girl is telling a number, the following girls told 10, 13 next turn is yours what u will say?
a) 15 b) 17 c) 14 d) 16