Cristina was born in 1888. She just had her 30th birthday today how did that happen?

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

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

A man dies of old age on his 25 birthday. How is this possible?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Prove that twice of ten is the same as twice of eleven.

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

What's the best place to go shopping in the ocean?