Here is a list of Edmund's Brainteasers:
Brainteaser 1 Brainteaser 1 Solution.
Brainteaser 2 Brainteaser 2 Solution.
Brainteaser 3 Brainteaser 3 Solution.
Brainteaser 4 Brainteaser 4 Solution.
Brainteaser 5 Brainteaser 5 Solution.
Brainteaser 6 Brainteaser 6 Solution.
Brainteaser 7 Brainteaser 7 Solution.
Brainteaser 8 Brainteaser 8 Solution.
Brainteaser 9 Brainteaser 9 Solution.
Brainteaser 10 Brainteaser 10 Solution.
Brainteaser 11 Brainteaser 11 Solution.
Brainteaser 12 Brainteaser 12 Solution.