Sum or difference

Exercise and reference answers

Questions

1. Answer

   Sum

   Question

   An ellipse holds this constant

   Choices

   1. Sum
   2. Difference

2. Answer

   Difference

   Question

   A hyperbola holds this constant

   Choices

   1. Difference
   2. Sum

3. Answer

   Sum

   Question

   Distances to two foci added

   Choices

   1. Sum
   2. Difference

4. Answer

   Difference

   Question

   Distances to two foci subtracted

   Choices

   1. Difference
   2. Sum

5. Answer

   Sum

   Question

   The closed oval curve uses

   Choices

   1. Sum
   2. Difference

6. Answer

   Difference

   Question

   The two branch curve uses

   Choices

   1. Difference
   2. Sum

Instructions

Pick the right one each time. Too many wrong picks and the tower falls.

Explanation