Find value of: (2)^1.56 * (3)^1.78 * (7)^0.78 * (84)^0.22 = ?

Question

If the following is true, can you find the value of (4 + 9)?

7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Answer 1

Answer: 252
(2)^1.56 * (3)^1.78 * (7)^0.78 * (84)^0.22
= (2)^1.56 * (3)^1.78 * (7)^0.78 * (4*3*7)^0.22
= [(2)^1.56 *(4)^0.22] * [(3)^1.78 * (3)^0.22] [(7)^0.78 * (7)^0.22]
= (2)^[1.56+0.22+0.22] * (3)^[1.78 +0.22] * (7)^[0.78 +0.22]
= (2)^2 * (3)^2 * (7)^1
= 4*9*7
=252