Loading page

Free practice to build real skill. Every question in every exam is free.

Practice
Guides
Leaderboard
Status Hub
Support us
About
Terms
Privacy
Report a problem
Made by CyberSkill
Follow CyberSkill on LinkedIn

CyberSkill is an independent practice-exam resource and is neither affiliated with, nor authorized, sponsored, or approved by, Anthropic, PBC. Claude and related marks are trademarks of Anthropic, PBC. Used here for nominative identification only.

Home Practice Brain Review Ranks

Brain

Short logic games that earn Books

Two puzzles, 5 minutes each. Clear one inside the time limit and you earn a Book for your next timed mock.

Guests can play. Log in to earn Books and Cranes.

Fill the Grid

Cover the board with rectangles. Each one holds exactly one number and has that many cells.

10 levels · 5 minutes

PlayPlay Fill the Grid

Connect It

Draw one path that joins the dots in number order and fills every cell.

10 levels · 5 minutes

PlayPlay Connect It

How rewards work

1 reward per game per day. A new day starts at midnight UTC.

Clear all 10 levels inside 5 minutes: 1 Book and 50 Cranes, once per game per day.
A hint costs 3 Cranes. More than 1 hint in a level, or 3 in a run, means no Book for that run.
3 free undos, plus 1 more for each level you clear. After that an undo costs 1 Crane.
Cranes you spend never lower your rank.

Brain counts toward the same leaderboard

Cranes from Brain count together with your Cranes from practice.

Leaderboard