Look for the common features in these graphs. Which graphs belong together?
A polite number can be written as the sum of two or more consecutive positive integers. Find the consecutive sums giving the polite numbers 544 and 424. What characterizes impolite numbers?
Which of these roads will satisfy a Munchkin builder?
Which of these triangular jigsaws are impossible to finish?
Can you make matrices which will fix one lucky vector and crush another to zero?
Charlie likes to go for walks around a square park, while Alison likes to cut across diagonally. Can you find relationships between the vectors they walk along?