Eddie's Math and Calculator Blog

TI-84+: BIN2DEC, DEC2BIN, DRAWICON Switching gears for a bit, this blog focuses on the TI-84+: BIN2DEC: Binary to Decimal: Now allows ...

HP Prime and HP 32S: Day Number of the Year This formula calculates the day number of any date (given month and day). A 365 day year is ...

Chinese Remainder Theorem - Sun Tzu (3rd to 5th century AD, China) This program solves for X for the set of three linear congruence equati...

Major thanks to Dr. Cliff Pickover for posting the link to this awesome video on my Twitter feed.  On January 9, 2014, Danica McKellar prem...

Happy Mid-January! Enjoying the first full moon of 2014? Solving a Single Linear Congruence Equation The program solves for x in the equ...

HP Prime: AMNI10 Waterfall Animation Background boxes with falling water. There is random mist coming from the water. Colors: Blue: #FF...

Given the lines of various length from a single vertex and the angles between the lines, the area of the field can be calculated. FANAREA...

Honestly the name of the object presented on this blog entry is made up names because I don't think there is an official geometrical n...

The Odds of Hitting it Big The number of possible combinations is fairly easy to calculate. You multiply the number symbols each slot has ...

In the classic game "Card Sharks", contestants had to guess and wager whether the proceeding card is higher or lower. The card ...

In these 24 hours, a new year will begin. Here is to a happy, healthy, and successful 2014. Cheers! Eddie

Drawing Iconic Pictures with the HP Prime 4 x 4 Pixels: DRAWICON4(number) Entry: Real number, integer The number is ultimately converted ...

Greetings! Thank you everybody for making this blog as successful as it is. Look for more exciting things to come into 2014. Merry Christm...

(Common) CAS Commands in Home Mode (udpated 4/17/2014) Two things to aware of: 1. Any command from the CAS mode to be used in the Home...