Find a caluculator, two dice and a friend.

Ask your friend to roll the dice without revealing to you the numbers.
Example : Your friend rolls a 4 and a 6

Ask your friend to multiply the number on the first die by 2
4 x 2 = 8

Add 5
8 + 5 = 13

Multiply by 5
13 x 5 = 65

Add the number on the second die
65 + 6 = 71

You can now predict the numbers on the two dice.

Here is what you must do:
Subtract 25
71 - 25 = 46
4 = first die
6 = second die.

Go buy yourself a swami hat!