Brain Test: Tricky Puzzles · Levels 621–640

Brain Test:
Defeat the Viking.

Level 639 · Answer

Defeat the Viking.

Brain Test Level 639 Defeat the Viking. gameplay screenshot
Gameplay preview from the dedicated Brain Test Game Level 639 walkthrough. Game artwork © Unico Studio.View source
Match the question before using the answer

This guide is mapped to “Defeat the Viking.” in the checked version. If Level 639 shows another question, use the text and screenshot rather than the number alone.

Solution checkedLevel 639 verified 2026-09-30 · verified

Last verified: · Verification method · Report a correction

Brain Test: Defeat the Viking. answer

If you searched for “Brain Test Defeat the Viking.,” this is the matching puzzle. It appears as Level 639 in the checked order. The question is “Defeat the Viking.” Its trick depends on how the wording, movable artwork, or screen controls behave.

Brain Test: Defeat the Viking. quick answer: Drag the small rock on the ground to the Viking's feet to trip him.

Step-by-step walkthrough

01

Read the trick

Treat “Defeat the Viking.” as an instruction puzzle rather than a trivia test, and check which visible element can produce the requested result.

02
03

Important notes

  • Keep your finger on the movable item until it reaches the named target; a tap alone may not register.
  • Do not add extra actions after the verified answer; many Brain Test puzzles punish an otherwise sensible second move.
  • Question order can change after an update, so match the wording and screenshot instead of trusting the number alone.
  • Restarting the level restores moved objects and counters if an earlier experiment changed the puzzle state.

Why this answer works

Drag the small rock on the ground to the Viking's feet to trip him. The puzzle rewards attention to the exact wording and to objects that can be moved or tapped, not a complicated calculation.

Useful solving habits

  • 1Read the prompt literally before applying real-world assumptions.
  • 2Test whether text, labels, and decorative objects are interactive.
  • 3Use the simplest gesture that matches the verified answer.
  • 4Compare the success frame with the screenshot if the result is unclear.

Collectibles and completion

There are no optional collectibles required to finish this puzzle; completing the verified action is enough.

Quick feedback

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