Do You See It?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What is more useful when it is broken?

Can you place three balls such that the equation shown in the picture holds true?

Can you make four (4) nines (9) equal 100?

What kind of tree can you carry in your hand?

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

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?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?