Do You See It?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

How many times can you subtract the number two from the number fifty?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Can you solve the below tricky visual equation?

What is full of holes but still holds water?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.