Memory Grid
Memorize the positions of the colored squares, then tap them after they disappear.
Explore quizzes
Choose your next challenge and start playing
Number Sequence Recall
Memorize the displayed number, then type it after it disappears. Each correct answer adds another digit.
Balance Scale: Find the Heavier Ball
Use a balance scale to find the only ball weighing 2 kg. Start with four balls; each correct answer adds a ball, with one minute per level.
Color Sequence
Memorize the color sequence and repeat it in the correct order.
Checkers
A strategy game: capture your opponent's pieces, make kings, and beat the computer.
Chess
A complete chess game against the computer, including check, checkmate, castling, pawn promotion, and en passant.
Gomoku - Five in a Row
A strategy game: make five stones in a row before the computer.
Othello
A strategy game: surround and flip your opponent's pieces, aiming to finish with the most pieces.
Connect Four
Drop the pieces and try to make four in a row before the computer. The opponent gets stronger with each win.
Treasure Box: Logical Reasoning
Find the correct box using logical rules that progress from simple to complex.
Treasure Box
Solve logic puzzles based on the boxes' statements and how many are true. Each level gets harder and has one solution verified by software.
Where Was the Ball?
A spatial memory test: remember the location of the requested-color ball after the balls disappear. Start with three balls; one is added after each correct answer.
Water Jug Measuring Puzzle
Use different measuring jugs to reach an exact amount of water. Each level gets harder, has limited moves, and has a pre-verified solution.
Draw the Line Without Lifting
Trace the entire shape in one continuous path without lifting your finger or mouse. Progress through increasingly difficult levels.
Number Puzzle and Picture Slider
Slide the tiles to arrange the numbers or rebuild an animal picture. Choose the board size and start.
Find the Matching Shapes
A visual search test: find the two identical shapes among the cards before time runs out. The grid gradually grows.
Sudoku
A professional Sudoku game with five levels, from easy to genius, and only five hints per round.
Number Memory Game
Memorize the number positions and tap them in order. Start with two numbers; one is added after each success.
Color Reaction Test
A quick test of attention and visual discrimination: match the requested color to the color of the word before time runs out.
Geometric Shapes
A visual logic test: which shape should replace A?
Picture Memory
Look at the picture, then answer questions about what you saw.
IQ Test
A progressive test of reasoning and logic.