Breakdown of Какой вулкан самый высокий в мире?
какой
which/what kind of (m, sister forms: какая, какое)
в
in / to (direction)
высокий
tall / high (of a level or amount)
самый
most
Questions & Answers about Какой вулкан самый высокий в мире?
Why are there two words for "the tallest" (самый высокий)?
Do both самый and высокий change their endings to match the noun?
Yes! Both words act like adjectives and must agree with the noun they describe. Since вулкан is a masculine noun in the nominative (subject) case, both take the masculine nominative endings: самый and высокий. If we were talking about a mountain (гора, feminine), it would be самая высокая.
Why use Какой instead of Что for "Which"?
Why does мир (world) have an -е at the end in в мире?