David Gray

Credit Card ValidationFrom the card number it is possible to derive the issuer and whether the card is valid.The following cards are covered:JCBVisaLa …

Getting a loan? Compute and manipulate the numbers to your advantage.The interest rate here has a name, it's called the APR (annual percentage rat …

Getting a loan? Compute and manipulate the numbers to your advantage.The interest rate here has a name, it's called the APR (annual percentage rat …

Flick-It - Reflex TesterTest the speed of your brain. Then test a kid. As we get older our reaction time slows and persons with demised capacity have …

Mortality - How long will you live?Based upon your age, determine the number of years you have to live. And if you are elderly the biggest selling pha …

Persons with dementia regresses. In addition to loss of memory, motor, language and thinking skills they exhibit child like behavior.If we can measure …

Measurement of the Child Like Age of Adults with DementiaPersons with dementia regresses. In addition to loss of memory, motor, language and thinking …

Aerobic Interval TimerExercise each of your muscles. You don t need a professional to tell you where they are. Exercise for 60 seconds, varying the in …

Flick-It - Reflex TesterTest the speed of your brain. Then test a kid. As we get older our reaction time slows and persons with demised capacity have …

Photograph an event, record the GPS location with a timestamp it, add a note and save as one image. Perfect to identify people, places and things. Esp …