What does this mathematical rebus means ?

Count the number of triangles in the picture below:

What is the word or phrase?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

I’m orange, I wear a green hat and I sound like a parrot. What am I?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

Which five letter word can be added at the end of below word to form a
valid word?

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