Heating oil prices can fluctuate widely over time and by location. 1  From January 2005 to March 2010, the average price nationwide was $1.95-$2.95 a gallon; from January to March 2012 the average weekly price was $3.85-$4.12. 2  A building/mechanical permit is usually required to replace a furnace.
Quick Answer. A MasterCard has a total of 16 digits. MasterCard, as well as most major credit card systems, use the ANSI Standard X4.13-1983 system, in which each digit identifies a particular attribute of the card. . Keep Learning.
Number A is my credit card number. The 4 groups don't have a meaning. They do, actually. First digit is 4 for VISA, 5 for Mastercard, 6 for Discover/Diners Club, 3 for American Express/Diners Club (those are shorter than 16). Also, first 6 digits for Visa and Mastercard are code numbers for the issuing institution. By these 6 digits anyone can know which institution issued the card, and what type of card it is (debit/credit, premiere or not, etc).