Problem Fields in Elementary Arithmetic

Problem E - hoadleymath

Problem D - SPA

Problem Corner Solutions

Problem and Solution as PDF - Illuminations

Problem A. Analogous Sets

Problem A. Amphitheatre

Problem A - UVa Online Judge

Problem A - Root Given a polynomial of degree 5, find the real root

Problem A - Complete the sequence

Problem A - ACM ICPC

Problem 9

Problem 5 – Catch the Bits

Problem 5 – Bits Up

Problem 4: Show that: 1 + 2 + 3 + + n = (n2+n) /2.

problem 4.3 – using prime factorizations

Problem 4 – Dancing Bits

Problem 4 – 3D Slices

Problem 3: We call a right triangle Pythagorean if each of its side

Problem 3: Page 1 - Art of Problem Solving

Problem 3.2 B 1. −5/2<3 because a negative number is always less