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Wait for the signal, then tap the field or press Space. Each wait lasts a different amount of time.

Respond to the signal itself. Pressing while the field says to wait counts as a false start.

Your result includes response speed, missed signals and false starts.

Find the current symbol in the key, then choose the number underneath it. A new symbol appears after each answer.

The key changes between runs. Use the one on screen instead of a mapping you remember.

Your result counts correct answers in 90 seconds and records errors separately.

Watch the tile positions. For each new tile, choose whether it matches the position two flashes earlier.

Compare the first and third flashes, then the second and fourth. The immediately previous tile is not the reference.

Sensitivity combines correct matches and false alarms. It is different from percentage correct.

Choose the missing answer in each generated pattern. The run mixes visual matrices, number sequences and spatial transformations across three levels.

Check that your rule fits the whole example. A rule that explains only one step may give the wrong answer later.

The result counts correct answers. These original puzzles do not produce an IQ score.

Choose the color of the letters, even when the word names a different color. For RED written in blue, choose blue.

Use the same rule on matching and conflicting trials. You need to distinguish the colors to play this task.

Results keep response time and accuracy separate, including trials where the word conflicts with its ink.

Study the word pairs, then choose the missing partner of each word. Remember the pair you saw, even when the words are unrelated.

The recorded task has a later recall round about 24 hours after learning. Return to your notebook for that round.

Initial and delayed recall are separate results. The actual delay is recorded.

Learn a transformation from example grids, or explore a small world to discover what its actions do. Apply what you find to the new challenge.

Grid puzzles can change colors, objects, counts or dimensions. Test a rule against every example before submitting.

The result shows challenges solved without hints. Level and settings stay attached to the run.

Watch the position and listen to the letter. Press a stream when it matches the same stream N steps earlier. Otherwise, wait.

Position and sound are independent. One, both or neither can match on a turn. Choose N and pace before starting; sound must be audible.

Results record sensitivity for the chosen settings, including hits and false alarms.

Compare position, spoken letter, color and shape with N steps earlier. Select each stream that matches and leave the others alone.

Several streams can match together. Follow the position as the cube turns, and check that you can hear the letters before starting.

Sensitivity and settings are saved for this task. Its scores are separate from Dual N Back.

Read each weekday. Press when it comes immediately after the day shown N steps earlier, with Monday following Sunday.

At N = 2, Monday, Friday, Tuesday is a match on Tuesday. Compare Tuesday with Monday, not with Friday.

The run records correct detections, false alarms and sensitivity at your chosen settings.

Compare the input and output examples, then draw the answer for a new input. The same transformation must explain every example.

Use the color palette and grid controls to build the output. Check the whole grid, including cells that should stay empty.

Your result counts fully solved grids at the selected level. It is not an IQ score.

Tap or click the bright core of each comet before its ring runs down. Targets arrive more often and disappear sooner as the run continues.

The tail is not a target. Aim near the center and keep moving to the next core.

Storm score rewards hits and precision. Mouse and touch runs use separate comparison contexts.

Compare two objects. Choose Same if turning one can match the other, or Mirror if a reflection is needed.

Follow the connected parts as a whole. A different viewing angle does not by itself make an object a mirror image.

Accuracy and response time are reported separately across 24 pairs.

Memorize each order before it disappears. Add the ingredients in the same sequence, then serve the goblin.

Orders grow from three to ten ingredients. Knowing which ingredients appeared is not enough if their order is wrong.

Service score reflects recalled sequences, with perfect orders and your best combo shown separately.

Choose the order of delivery stops. Reach each one before its route deadline, then return to the depot within the fuel budget.

Check the full route before dispatching. Planning time does not use fuel; the route length does.

Dispatch score rewards successful, efficient routes. Clicking faster does not improve it.

Read the current rule, then send the creature to the matching portal. A turn may ask for its color or its shape.

Check the rule again on each turn. A portal that was correct under the last rule may be wrong now.

Portal score combines accurate sorting and speed. The run also records mistakes after rule changes.

Submit a code, then use the clues to improve your next guess. Exact means the right symbol in the right spot. Elsewhere means the right symbol in a different spot.

Read the repeat rule for each code. Later levels add slots, symbols and different repeat rules.

Deduction score uses solved codes and guesses. There is no time limit.

Watch the route, then trace it after it fades. Tap the end of each straight stretch to include every tile along that stretch.

Stop at the corners before changing direction. Routes get longer, with less memorization time per stop.

Voyage score records route recall, including perfect routes and the longest route completed.

Find and tap the T among the L shapes. Every shape can be rotated, so look at where its two lines join.

A T joins at the middle of a bar. An L joins at the end. Work through each new field before the run ends.

The result counts correct searches per minute and keeps errors in the record.