Please help! I don't understand :(

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Is it greater than or less than7*3_9*2

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice