Шість друзів у парку.

Because after numerals five and higher, Ukrainian normally uses the genitive plural form of the noun.

So:

• один друг
• два / три / чотири друзі
• п’ять / шість / сім друзів

That is why шість друзів is the normal pattern.

The dictionary form is друг, meaning friend.

Its important forms here are:

• друг — singular nominative
• друзі — plural nominative
• друзів — plural genitive

So in this sentence, друзів is not a different word; it is a different case form of друг.

Because after у / в when talking about location, Ukrainian uses the locative case.

So:

• парк — base form
• у парку — in the park

This is a very common pattern:

• у місті — in the city
• у будинку — in the building
• у парку — in the park

Both у and в can mean in. Ukrainian often switches between them for ease of pronunciation and smooth sound.

Here, друзів в парку would put several consonant sounds close together, so друзів у парку sounds smoother.

This choice is usually about euphony, not a difference in meaning.

Ukrainian often omits the present-tense verb to be in simple statements.

So English needs There are six friends in the park, but Ukrainian can simply say:

• Шість друзів у парку.

This is especially natural in short descriptions, captions, and simple statements.

Both are possible.

• Шість друзів у парку puts attention first on six friends
• У парку шість друзів puts attention first on the location

Ukrainian word order is more flexible than English, and changing the order often changes the focus rather than the basic meaning.

Yes. With people, Ukrainian can also use collective numerals.

So both are possible:

• шість друзів
• шестеро друзів

For learners, шість друзів is the simplest and safest pattern to learn first. Шестеро друзів can sound a bit more like referring to the group as a set of people together.

The ь is the soft sign. It does not have its own sound. It makes the preceding consonant softer.

So шість is pronounced roughly like sheest’, with a short, soft ending.

A rough breakdown:

• ш = sh
• і = ee
• с
  • ь = a softened s
• т = t

So the word is one syllable: шість.

It can be understood as a full sentence, but it also has a very natural caption-like or descriptive feel.

Because Ukrainian can omit the present-tense to be, short noun-and-location sentences like this are common in:

• picture descriptions
• simple observations
• textbook examples
• captions

So it is perfectly understandable, but in real conversation you might also hear fuller versions depending on context.