NUMBER SENSE · 20 ROUNDS
Count a group of briefly flashed dots, then choose the total from three answers.
Complete 20 rounds. Every count from 2 through 8 will appear.
READY?
The dots disappear before the three answer choices appear.
Keyboard: 1, 2, or 3 selects the answer position · Touch or mouse: choose a number
HOW TO PLAY
Start a round and watch the display. Between two and eight separated dots appear briefly.
Hold the quantity in memory after the dots disappear.
Choose one of three totals with keys 1–3 or the large touch buttons.
QUICK NUMBER SENSE
Small groups can often be recognized without counting each item one by one. This rapid quantity judgment is sometimes called subitizing.
Because the dots vanish before you answer, the game also uses brief visual memory and fast choice selection. Random spacing stops you from memorizing a fixed pattern.
READ YOUR RESULT
Reaction time starts when the dots disappear and the answers become available. Average and best times use correct answers only.
Accuracy includes every wrong answer and timeout. Standard mode always presents all counts from two through eight for a broader comparison.
QUESTIONS
Standard mode shows them for about 600 milliseconds. Endless mode gradually reduces the flash to 180 milliseconds.
Each round shows the correct count and two different nearby totals. Their positions are shuffled, so the correct key changes.
The flash and answer window both shrink. Your first wrong answer or timeout ends the run.
Yes. The three answers are large touch targets and the game fits small screens without horizontal scrolling.