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

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Can you count the number of quadrilaterals in the picture below?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Can you identify the hidden rebus in the image below?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

Can you move 2 matchsticks to form four equal sized squares.

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99