Can you make four (4) nines (9) equal 100?

How many times can you subtract the number 5 from 25?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Find the Odd One Out?
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What can you hold in your right hand, but never in your left hand?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

The host of a game show offers the guest a choice of three doors. Behind one is an 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?