Calgary engineer believes he's cracked the mysterious Voynich Manuscript

[ReneZ]

As you can see, the first number of "Persian language of YEK" (آ /  یکی) and the Turkish word "TEK" overlap both phonetically and in meaning. We can establish similar examples between the number pronouns in English and the number pronouns in Turkish too. Etc. ...

For example, VAR (BAR/BİR) > ONE sound conversion should probably have passed from one of the Tatar-Turkish dialects to English as ONE. (VAR > ONE) are words that are close in sound value and overlap in meaning. 

The word THREE (3) in English is the sound form of the word DİRİ/TİRİ in old Turkish. This word can be use as the name of the third finger in our hand in Turkish and one of its many meanings in Turkish was (UZUN/DİRİ/İRİ) "longer than the others (it was said for the longer finger)".

It is true that the numerals from one to ten give some good hints (but of course not 'proof') about the relation  between languages. It is easy to see how these numerals in Farsi / Persian are related to several Indo-European languages. Of course, that is just a small part of the evidence that Farsi is Indo-European.

It is also easy to see that the modern Turkish numerals do not look like Indo-European numerals *at all*.

However, if another set of words, which could include "Tek"  and "Diri"/"Tiri", in old or modern Turkish, do resemble Indo-European numerals, then it is just possible that these were introduced in parallel from neighbouring languages. And these could very well be Indo-European.

Exactly the same thing happens in the Thai langauge. This is a S-E Asian language which has no relation whatsoever with Indo-European. The words for one to five are:
Nüng, Song, Sam, Si, Ha.
However, there is another set that is used a.o. as prefixes, which sounds like:
Ek, To, Tri, Jattawa, Benja.
This shows a strong relation with Indo-European. How could that happen?
Easy. The main religion in Thailand is Buddhist, and many words related to religion derive from Sanskrit, which is Indo-European. Others derive from Pali, another Indian language.

So, if Persian numerals appear similar to some versions of Turkish numerals, this does not mean that Persian is not Indo-European. To the contrary. It rather indicates that these Turkish versions derive from Indo-European.

However, just two out of ten isn't anywhere near sufficient, and a relation between "Tek" and "Yek" appears very far from certain to me.