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.

It could be done in following way. Remove the seleted area

And it will look like this:-

Arrange the 6 matchsticks to form 4 equilateral triangles with an edge length equal to that of a single matchstick. Hint: you are allowed to use glue.

What is the relationship between these matchsticks pictures below?

You need to remove two matchsticks to make the below equation true. Can you do it?

Moving only two sticks from the number formed with matchsticks, what is the largest number that you can get?

What is the maximum number you can create by adding exactly 3 matchsticks?

Note: The maximum number should be of three digits.