How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you count the number of triangles in the given figure?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?