Question

If 87 +92 = 22 and 57 +83 = 17 and 39 + 21 = 13 what is the answer in 52 + 31 =?

Answer 1

Given :

87 + 92 = 22

57 + 83 = 17

39 + 21 = 13

These given expressions are in a same pattern.

To Find :

We have to find 52 + 31  as the above pattern.

Solution :

The logic of given pattern : (a+b) + (c-d) = xy

87 + 92 = 22 :

(8 + 7) + (9 - 2)  = 15 + 7 = 22

57 + 83 = 17 :

(5 + 7) + (8 - 3) = 12 + 5 = 17

39 + 21 = 13 :

(3 + 9) + (2 - 1) = 12 + 1 = 13

Similarly,

52 + 31 = ?

(5 + 2) + (3 - 1) = 7 + 2 = 9

Therefore, 52 + 31 = 9

Answer 2

Answer:

the correct answer is 9