What comes next in the sequence? 2, 4, 8, 16, ?

If you rearrange "CIFAICP" you get the name of a:

Mary has 4 daughters. Each daughter has a brother. How many children does Mary have?

Which shape has no sides?

If it takes 5 machines 5 minutes to make 5 gadgets, how long for 100 machines to make 100 gadgets?

Which one is heavier? 1 kg of feathers or 1 kg of rocks?

Which is the odd one out?

A farmer has 17 sheep. All but 9 run away. How many are left?

John’s father has three sons: Snap, Crackle, and ____?

How many months have 28 days?