Epsilons will be good for filling spare mathematical moments. Why not carry a few around with you? (Our first collection of epsilons are here).
Ab Surd Ity
Biggest Bendy
BT... Eat Your Heart Out
If the last four digits of my phone number are placed in front of the remaining three you get one more than twice my number! What is it?
Baby Circle
A small circle fits between two touching circles so that all three circles touch each other and have a common tangent? What is the exact radius of the smallest circle?
Three Ways
If x + y = -1 find the largest value of xy by coordinate geometry, by calculus and by algebra.
Upsetting Pythagoras
Find the smallest integer solution to the equation 1/x^2 + 1/y^2 = 1/z^2