What does a man do only once in his lifetime, but women do once a year after they are 29?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Can you fill the blank with the correct number?

6 30 870 756030 _____

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

If 1+9+8=1, what is 2+8+9?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?