English Riddle 3/guess my code

[Dr. Prince]

Hi Mats.....RAMADAN MUBARAK
Welcome again to this series
In this riddle you must guess my code which is
contian of four digits .....make use of the writes here

V and X given to you in past where Olympus are on
A...C in the future with world's vioce....END

Hope you like it

[Dr. Prince]

Hi members....Seems no one figured my code
Nevermind I will solve it.....
The first write said
V and Xgiven to you in past where Olympus are on

It's refere to old greece and that's lead as to there numbers
So simply V is 5 and X is 10 .....V and X mean 5+10=15
So first two digits is 15........nice idea ,Doesn't it?

The second writes is
A...Cin the future with world's vioce

The vioce of the world to day is english as we know
But what A,C refere to?!It's tell no number
So i must decode it as number in it's alphabatic rank
A=1 ,, ,, ,, C=3
So the second digits is 13 and the whole code is
1513
......
So smart

[katsumi san]

Yes, it's really smart
thank you brother dr prince for the nice riddle

[Dr. Prince]

Thank's Sis.....Seems u like riddles so much