Business · data
Rescue a tiny invoice
Your outcome: a report showing the number of complete, unique lines and their total, with a list of rows needing review.
id,item,qty,unit_price
A1,Seed,2,4
A1,Seed,2,4
A2,Pot,3,5
A3,Soil,,6
Rules: count exact duplicate rows once; exclude a row with a missing quantity. Do not guess the missing value.
Evidence: show your arithmetic, identify the duplicate and exception, and explain what your assistant did. Check against the original rows yourself.
Reveal a new constraint
The report must fit in a short text message and still identify every excluded row. Revise your output without changing the source data.
Show the independent check
A1 counts once: 2 × $4 = $8. A2 is 3 × $5 = $15. The two complete unique lines total $23; the duplicate A1 is removed and A3 needs a quantity.
UX · communication
Make booking understandable
Your outcome: a sketch or short interactive prototype for booking a meeting room on a phone.
Facts: Tuesday at 2 pm is unavailable; Tuesday at 3 pm is available. The learner must be able to choose the available time and see a confirmation. This is fictional: there is no booking service behind it.
Evidence: show the unavailable state, the 3 pm choice and a confirmation; explain the labels and a way to change the choice. Check touch targets and keyboard use where your prototype supports them.
Reveal a new constraint
A visitor cannot use color alone to tell whether a time is available. Adapt your design and explain the additional cue.
Show review prompts
Can someone identify the unavailable time without color? Can they choose 3 pm, see what was selected and find a way back? A picture alone does not establish keyboard or screen-reader behavior.
3D · built environment
Check a room brief
Your outcome: a simple room sketch or model and a traceable wall-area calculation, with units and assumptions.
Practice dimensions: a rectangular room is 4 m long, 3 m wide and 2.5 m high. There is one 1 m × 2 m door and no windows. Calculate wall area excluding the door; ignore wall thickness, floor and ceiling.
Evidence: list the four wall areas, door deduction and units. Mark the drawing as a conceptual practice artifact and identify what measurements a qualified person must verify.
Reveal a new constraint
A 1 m × 1 m window is added. Update the wall area and record the change; do not assume a location for the window.
Show the independent check
Two long walls: 2 × 4 × 2.5 = 20 m². Two short walls: 2 × 3 × 2.5 = 15 m². Subtract the 2 m² door: 33 m². With the added 1 m² window, the result is 32 m² under the same assumptions.
A sketch or 3D mesh is not a verified BIM model or construction document. Real measurements, code compliance and professional approval require qualified independent review.
Software · automation
Build a resilient total
Your outcome: a small interface or written algorithm that totals non-negative quantities without sending data to a service.
Requirements: accept two whole numbers, display their sum and reject a blank, negative or non-integer input with a clear message. Do not calculate a total for invalid input.
Evidence: record your chosen harness and tools, the result, and tests for 2 + 3, 0 + 0, a blank, −1 and 1.5. Try it with a keyboard or explain what remains untested.
Reveal a new constraint
One input is unavailable on a phone. Adapt your interface so someone can enter both values without a mouse, and repeat your tests.
Show the independent check
2 + 3 must produce 5; 0 + 0 must produce 0. Blank, −1 and 1.5 must each produce a clear validation message and no new total. Test the actual result; an assistant’s claim that it works is not evidence.
