Bachet's Problem: as few weights to weigh them all
Banach matchboxes problem and a congruence for primes
Barrow and Leibniz on the fundamental theorem of the calculus
Best approximation with wavelets in weighted Orlicz spaces
Bidding chess
Bimagic Squares of Bimagic Squares and an Open Problem
Biography of John Rainwater
Book Review: "A beautiful math. John Nash, game theory, and the modern quest for a code of nature" by Tom Siegfried (Joseph Henry Press, 2006)
Book Review: "Geometry of Quantum States" by Ingemar Bengtsson and Karol Zyczkowski (Cambridge University Press, 2006)
Boring mathematics, artistes pompiers and impressionists
Boris Venkov's Theory of Lattices and Spherical Designs