1 billion is less than 100 billion.
No. Only slightly more than a third of that
It is equal to 1 billion, not more nor less.
Yes. You have lived 1million seconds by the time you are 12. You've lived more than that, but 1million seconds is included in those 12 years. its also been included in your first couple of weeks, but still the answer is yes.
It's less. There are 604800 seconds in a week
It is equal to exactly 1.12 billion: no more, no less.
By the uniqueness of numbers, it is equal to 18 billion: no more, no less.
1 billion is equal to exactly 1 billion, not more nor less.
1 trillion is more than 100 billion.
It is less because 8*60 = 480 seconds