Crossroad Multitasker - task switching drill
Two streams, one keyboard.
Peripheral tracking and motion congruence under rapid set-shifting. 35 trials, and the rule changes without warning.
Is the duck running in the SAME direction as the road flow?
Is the highlighted quadrant’s (NW, NE, SW, SE) result EVEN?
The trials where the stream changes take longer than the ones where it does not. That difference - not raw speed - is what this drill is actually training down.
About Crossroad Multitasker
A duck at a 4-way crossroad and four corner math pods - answer whichever question is live as it switches unpredictably between the two streams.
Two things are always on screen: a duck facing one of four cardinal directions on roads painted with flow arrows, and four corner math pods (simple multiplication, addition, or subtraction), one of which is highlighted as live. Each trial asks one of two questions - motion congruence ("does the duck's facing match the road arrows?") or quadrant math ("is the live corner's result even?") - and you answer YES or NO.
Which stream is asked switches unpredictably from trial to trial, including sometimes staying on the same stream, with a run capped at 3 in a row - so you can never settle into one task or anticipate the switch. A run is 35 trials, and the trial ends the moment you respond; your reaction time is measured from trial start.
Controls: Z or the left arrow answers YES, M or the right arrow answers NO, and there are on-screen buttons labelled to match the live question (YES MATCH / NO DIFFERENT for duck trials, YES EVEN / NO ODD for math trials).
Why quant interviews test this
Task switching is the paradigm cognitive psychology uses to measure executive control, and the switch cost this game reports is its standard metric - the reaction-time price of changing task sets. Trading firms' assessment batteries include dual-stream and switching tasks for a direct reason: desk work is exactly this, monitoring several simple things whose demands interleave unpredictably.
The skill that transfers is the discipline of reading what is being asked before answering, and keeping cheap state refreshed so a switch retrieves an answer instead of starting a computation. That habit shows up in fast-paced interview games and in the job they screen for.
The Crossroad Multitasker guide covers how scoring works, the strategy that wins, a worked example and the mistakes most players make.
More Drills games
- Arithmetic Drill - A 20-card flashcard race across twelve arithmetic categories - play solo or race a ghost recording of a real past run.
- Fermi Estimation (Classic) - Quote a low-high range on ten real-world estimation questions - points for containing the truth, more points for a tight range.
- Sequence Sprint - Find the rule and type the next number - freshly generated arithmetic, geometric, square, alternating, and Fibonacci-style sequences.
- Duck Duck Dash - An endless runner through a sunny field where the only way to hop is answering a mental-math question - one collision ends the run.
- Likelihood Ranking - Order outcomes from most to least likely - student score tables, distributions, dice and card events, Poisson arrivals, urns, and scatter plots.
- All Drills practice
- Every game guide