Numbers

Ref: Unk (unk). Numbers.

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Roman Numerals: I= 1, V= 5, X= 10, L=50, C= 100, D= 500, M= 1000.
- 1988: MCMLXXXVIII
Social Security Number: The first three digits identify where you received your SSN from.
- 532= Washington.
Tires: P195/80R15
- P= passenger, 195: Section Width in mm, 80: Aspect Ratio, R: Tire Type- Radial, 15: Rim Diameter
Distance
- Meter: The distance from the equator to the North Pole divided by 10M.
- Fathom: 6’.
- Cable: 120 fathoms.
- Nautical Mile (NM): 8.44 Cables, 1852m, 6076’, Mile * .87.
Food & Drinks
- Lite Beer: 1/3 less calories than regular Beer produced by the same company.
Finance
- Checks # on Bottom: 1/1234/2345/6/345/7: 1: Null, 1234: Banks Federal Reserve District, 2345: Bank ID #, 6: Check Digit, 345: Bank’s Particular Branch, 7: Check Digit.
- Credit Cards Lead #: 4: Visa, 34 or 37: AMEX, 51-55: Masters, 6011: Discover.
- Dow Jones: Reports the averages cost per share of stock from 30 companies chosen by board of NYSE.
Health
- Blood Pressure (BP): 120/80 is optimal.
  - Systolic (Higher #): BP against the artery walls when the heart contracts.
  - Diastolic (Lower #): BP against the artery walls when the heart is at rest.
- Body Mass Index (BMI): Weight (kg)/(Height in m squared).
- Calorie: Amount of energy required to raise 1g of water by 1 degree Celsius.
  - 1lb= 3500 calories
  - 1g Protein= 4 cal.
  - 1g Carbs= 4 cal.
  - 1g Fat= 9 cal.
- Blood: ~55% Plasma (91% of plasma is H20), 7% Blood Proteins, 2% Nutrients.
Business
- Universal Product Code (UPC): 12 digits grouped into numbers.
  - 1st Digit: # System Character (0: Nationally Branded Products).
  - Next 5 Digits: Uniform Code Council (UCC) assigned Manufacturer.
  - Last 5 Digits: Product, Size, Color, other information by manufacturer.
  - Final Digit: Check Digit
- Consumer Price Index (CPI): Tracks the cost of 211 good and services; given as % to describe the change in price over time.
Math
- Pi: 3.1416- the # of times the diameter of a circle will go around the circumference.
Weather
- Windchill: (F)= 35.74 + .6215 (Tf) – 35.75 (V.16) + .4275 (Tf) * (V.16)
  - T: Temperature in F, W: Wind Speed in mph.
Computing
- Byte= 1 piece of information= 8 bits.
- Read Only Memory (ROM): Memory required to control computers functions.
- Random Access Memory (RAM): Stores working data and machine code.
Electronics
- Current (Amps): Measure of electrical current (e-/s).
- Voltage (Volts): Measure of pressure pumping current.
- Resistance (Ohms): Measure of resistance slowing the flow of current.
- Work (Watts): The amount of work an appliance is capable of.
- Water-Hose Analogy: Watts are the power that amps (water) have when propelled at a certain voltage (pressure) past a resistance of ohms (through a hose of certain size).
- V= IR & P= V*Current.
- 1 Watt= 1 Amp/1 Volt: 1 Volt will drive 1 Amp through a resistance of 1 Ohm.
Fertilizer: Given by N-P-K Ratio.
- N: Supports stem and leaf growth.
- P: Supports root growth.
- K: Supports flowers, fruits, and sturdiness.
Energy
- British Thermal Unit (BTU): Energy required to raise the temperature of 1lb of water by 1 degree F.
  - 1 Thermal Unit= 100,000 BTUs.
  - 1 cal= 1/252 BTUs.
- Light Bulbs
  - Watts: Energy you pay for when you use the bulb.
  - Lumens: Measure of Brightness (1 lumen = light from one candle).
Volatility
- Volatility: Tendency of gas to vaporize.
- Gasoline:
  - Minimum Octane Rating= (R+M)/2, R= research method for low volatility, M= research method for high volatlilty.
  - 87= 87% ISO Octane & 13% Heptane.
- Oil: 1 barrel of crude oil= 42 gal crude oil, which makes 8-25 gal of gasoline.
Precious Minerals
- Precious Gems: Carat (2g)
- Gold: Karat, 24K= 100% (14K= 14 parts pure Gold, 10 parts alloy).

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