How many days did Goliath challenge Isreal to send a man to fight him?

a) 2 days
b) 13 days
c) 40 days
d) 75 days

the answer is 40 days i think 1 sam 17:16 says for fourty days the philistine came forward every morning and evening and took his stand

40 days - as in almost every instance where God brought himself glory and man's humbling.

well, even if you weren't a bible scholar, you could come to the conclusion that it was forty days because that number was used alot, so i am going with 40 days