If eleven plus two equals one, what does nine plus five equal?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

How is the moon similar to a dollar?

Count the number of triangles in the picture below:

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

What kind of tree can you carry in your hand?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

I am quite hot but become too cold if you remove the first two letters. What am I?