Maths › Flashcards › Decision 1: lesson checks, part 2

Decision 1: lesson checks, part 2 flashcards

This deck has 5 check-yourself questions and 4 spot-the-error cards. The misconception each lesson corrects, and its check-yourself question with the worked answer. Rate each answer, and the card comes back sooner or later depending on how you rated it.

Further Maths · all 584 maths cards

How the five kinds differ

Standard results ask you to recall a formula or a value. Definitions ask you to state a mathematical term precisely. Recall prompts ask for a rule, condition or method. Check yourself cards are a short question with its answer. Spot the error cards ask you to correct a statement that is wrong.

Every card in this deck

Choose any card to try it in the player above. Each card links to the lesson that teaches it.

• Deleting node P leaves a minimum spanning tree of weight 48, and the two shortest edges from P are 9 and 11. State the lower bound.Check
• The critical path is the route through the network with the most activities on it.Spot the error
• An activity has earliest start 6, duration 4, and latest finish 13. Is it critical?Check
• If two activities each have three days of float, both can be delayed by three days without affecting the project.Spot the error
• A project of duration 20 days has activities totalling 62 worker-days. Find the lower bound on the number of workers.Check
• The optimal solution of a linear program is always at the vertex furthest from the origin.Spot the error
• Write 5x + 2y ≥ 30 as an equation using a surplus and an artificial variable.Check
• The Simplex algorithm stops when the value in the bottom right corner stops increasing.Spot the error
• In a tableau the pivot column entries are 2, −1 and 4, with values 12, 8 and 20. Which row is the pivot row?Check

The lessons these cards come from

• Critical path analysis
• Float, Gantt charts and scheduling
• Linear programming: formulation and graphical solution
• The Simplex algorithm
• The travelling salesman problem

Your progress is saved in this browser unless you sign in, as it is for the revision checklist. For offline revision, the Anki decks and printable packs have the same cards.