Integers - Express and explain -15.6x10^-20 as an integer multiple of 2.3x10^-20
Lowest Common Multiple (Prime Factorizations) - Let a and b be integers. A common multiple of a and b is an integer n for which a|n and b|n. We call an integer m the least common multiple of n provided (1) m is positive, (2) m is a common multiple ...
Proof methods & strategy -
Problem: Prove that there is a positive integer that equals the sum of the positive integers not exceeding it. Is your proof constructive or nonconstructive?