John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?