Explanation: In each row, add together the numerical values of the pairs of letters to the left and right, then calculate their difference, putting the letter with this numerical value in the centre space.
In the following question, out of the four alternatives, choose the word which best expresses the meaning of the given word and click the button corresponding to it.
The urinary system purpose in the human body is to eleminate the waste from the body. The urinary system is also called as Rena system. It consists of kidney, ureter, urinary bladder and urethra.