Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

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?

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

In the four images below, can you find the odd one out?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

How can one talk without saying a single word?

Through your logical capabilities, can you make 7 an even?

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

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?