#1. var a; var b = 6; var c = a + b; // What does a equal? undefined // What does b equal? 6 // What does c equal? NaN

#2 var a = true; var b = false; var c = a + b; var d = a - b; // What does a equal? true // What does b equal? false // What does c equal? 1 // What does d equal? 1

#3 var a = true; var b = 'false'; var c = a + b; var d = a - b; // What does a equal? true // What does b equal? "false" // What does c equal? truefalse // What does d equal? error

#4 var a = "3"; var b = "4"; var c = "five"; var d = a + b; var e = a * b; var f = a + c; var g = a * c; // What does d equal?34 // What does e equal?12 // What does f equal?3five // What does g equal? error