are you smarter than a fifth grader

$100, 000 qns:
If the diameter of a circle is 4 inches, what is the radius?

$175,000 qns:
On which continent do you find the natural habitat of the Giant Panda?

$300,000 qns:
How many months in a year has more than 31 days?

$1,000,000 qns:
What continent is also a country?

remarks: bring this game show into Singapore and everyone will be a freakin' millionaire...