What does this below rebus puzzle mean?

Forwards I am heavy, backward I am not. What am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

In the image given, you can find several triangles. Can you count them all?

what does the below math rebus puzzle mean?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You see me once in June, twice in November, and not at all in May. What am I?