Numbubbles
Numbubbles shows a target number and bubbles carrying small equations that fade in, linger and fade out; pop every bubble whose equation equals the target before it disappears. Equations ramp from simple two-number sums to bracketed three-number expressions and negative targets. It is in every Cognify battery, including the three-game US default. A candidate session recording pins the format at 10 rounds of 20 seconds each and reveals streak-based scoring: each consecutive correct pop is worth one more star than the last, up to five, and a wrong pop resets the streak.
Create an account to save your results. A Cognify pass includes unlimited replays. All results stay free.
Updated
How to play
A target number appears; bubbles with equations fade in around it.
Pop every bubble whose equation equals the target — wrong pops reset your streak.
Each round lasts 20 seconds; there are 10 rounds.
Consecutive correct pops are worth 1, 2, 3, 4, then 5 stars each.
In the real assessment
The 10 × 20-second structure and bubble behavior are first-hand confirmed from a candidate session recording (a circulating “9 seconds per target” figure is wrong). The streak scoring rule is fitted exactly to every observed round total in that session rather than published anywhere; spawn rates and bubble lifetimes for late rounds are estimated.
Skills assessed
Create an account to save your results. A Cognify pass includes unlimited replays. All results stay free.
Score improvement across practice attempts
Across our matched practice data, the median candidate improves their score by +23% between their first and fifth practice attempt on a game — with no employer ever seeing practice data.
Read the full methodologyMedian Criteria Cognify score lift by practice attempt
Median paired change vs. first attempt on scored Criteria Cognify practice games. Observed practice association — not a hiring-outcome guarantee.
Companies reported to use Numbubbles
Candidates report seeing Numbubbles in assessments for these employers. Assessment stages can change by role, region, and recruiting cycle, so check your invitation before practicing.
Independent Cognify-style practice. GameAssessmentPrep is not affiliated with or endorsed by Criteria Corp. Employers configure the battery (the US default runs three games; the full suite runs six); timing and scoring vary — your invitation is authoritative.