2, 3, 5, 9, 17, _ What is the next number in the sequence?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Where do you go to learn how to make ice cream?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

You can hear me, but you can't touch or see me.

What am I?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Why do you find that most of the buildings are deprived of the 13th floor?