Change-making problem

src: i.ytimg.com The change-making problem , also known as minimum coin change problem , addresses the question of finding the minimum numbe...

Silver as an investment

src: i.ytimg.com Silver may be used as an investment like other precious metals. It has been regarded as a form of money and store of value ...

Numismatics

src: numismaticswithkenny.files.wordpress.com Numismatics is the study or collection of currency, including coins, tokens, paper money, and...

Gold as an investment

src: xdirect.co.in Of all the precious metals, gold is the most popular as an investment. Investors generally buy gold as a way of diversify...

Double eagle

src: upload.wikimedia.org A double eagle is a gold coin of the United States with a denomination of $20. (Its gold content of 0.9675 troy o...