Some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation
7 + 2 = 57, 6 + 3 = 63, 5 + 4 = ?1
89
2
64
3
69
4
139
Some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation
7 + 2 = 57, 6 + 3 = 63, 5 + 4 = ?